---
title: 'Top 20 Best MCU Villain Debuts'
source: 'https://youtube.com/watch?v=c7YKMcM3NTc'
video_id: 'c7YKMcM3NTc'
date: 2026-08-09
duration_sec: 1374
---

# Top 20 Best MCU Villain Debuts

> Source: [Top 20 Best MCU Villain Debuts](https://youtube.com/watch?v=c7YKMcM3NTc)

## Summary

This video from WatchMojo counts down the top 20 best bad guy debuts in the Marvel Cinematic Universe, highlighting the most impactful and memorable villain introductions. From cosmic threats like Galactus to personal foes like Killmonger, the list covers a range of characters that have defined the MCU's villainous landscape.

### Key Points

- **Galactus Debut** [00:35] — Galactus debuts in 'The Fantastic Four: First Steps' as a powerful, comic-accurate threat, avoiding the cloud controversy of the past.
- **Jean Grey Reveal** [02:49] — Jean Grey is revealed as the unseen enemy in 'Spider-Man: Brand New Day', controlling everyday New Yorkers.
- **Namor's Debut** [03:17] — Namor debuts as a vicious and strategic villain in 'Black Panther: Wakanda Forever', bringing the fight to Wakanda.
- **High Evolutionary's Evil** [04:27] — The High Evolutionary is introduced as pure evil, obsessed with experimentation and torturing animals.
- **Doc Ock's Return** [05:33] — Doc Ock returns in 'Spider-Man: No Way Home', proving he can still be a formidable foe.
- **Real Mandarin Arrives** [06:42] — The real Mandarin is finally introduced in 'Shang-Chi', correcting the joke from Iron Man 3.
- **Killmonger's Motives** [08:04] — Killmonger is a charismatic villain with motives that resonate, aiming to empower the Disney franchise.
- **Agatha's Reveal** [09:13] — Agatha Harkness is revealed as a witch in 'WandaVision', with a memorable musical montage.
- **Kingpin's Menace** [10:19] — Kingpin is a methodical and calculated mob boss in 'Daredevil', capable of extreme violence.
- **Winter Soldier's Debut** [11:34] — The Winter Soldier is a brainwashed assassin who brings the fight to Captain America.
- **Harrow's Cult** [12:57] — Arthur Harrow is a cult leader who judges people for future sins in 'Moon Knight'.
- **Mysterio's Twist** [14:17] — Mysterio is revealed as a master illusionist with a vendetta against Stark in 'Spider-Man: Far From Home'.
- **Gorr's Origin** [15:09] — Gorr is a god butcher driven by grief in 'Thor: Love and Thunder'.
- **Cassandra Nova's Power** [16:10] — Cassandra Nova is a powerful telekinetic villain in 'Deadpool and Wolverine'.
- **Hela's Arrival** [17:07] — Hela is the goddess of death who crushes Mjolnir and lays waste to Asgard in 'Thor: Ragnarok'.
- **Ronan's Brutality** [18:12] — Ronan the Accuser demonstrates his brutality in 'Guardians of the Galaxy'.
- **Loki's Invasion** [19:00] — Loki's reintroduction in 'The Avengers' shows him as a vicious leader of an alien invasion.
- **The Void's Horror** [19:57] — The Void is a superpowered manifestation of trauma in 'Thunderbolts'.
- **Ultron's Debut** [20:38] — Ultron is an AI that decides humanity is worth exterminating, with a haunting introduction.
- **Thanos's Arrival** [21:52] — Thanos's debut in 'Infinity War' establishes his threat by defeating the Hulk and killing key characters.

## Transcript

I told you, time isn't worth it. Welcome to WatchMojo, and today we're counting down our picks for the best bad guy debuts in an MCU.
We'll be talking spoilers for various MCU movies and shows, so consider this your warning. Acadius. Hotspot. What? What happened to you? What happened to me?
Number 20. Galactus. The Fantastic Four First Steps. He's the devourer of worlds, the consumer of the cosmos, and one feared supervillain overall. We've been waiting a very long time for Galactus to finally show up in the MCU, and we had a few concerns.
concerns. None of us wanted him to be another Cloud like the last version. Thankfully this
time he wasn't. When he's on screen we feel the power he possesses and the danger The whole movie is about trying to stop him from invading the fantastic Thor's world and the threat feels real. Time to feed.
Put down my son. He's also far more comic accurate in his version.
From the first meeting to the final fight, he means business. Galactus could be a big bad for the entire MCU, so here's hoping he returns.
Number 19, Jean Grey, Spider-Man Brand New Day. Technically, when Peter Parker first encounters this telepath, it is in face-to-face. Peter instead faces several everyday New Yorkers who this unseen enemy has taken control of.
Every time Peter catches up to her, she splits into another body, which makes the chase all the more unsettling. Here's a face with a breath we can't control. One we can't even see. Sometimes, she makes it clear to Peter who he's talking to.
Other times, she blends right in with Peter, being none the wiser. Yo, Spider-Man, you okay? And you get rid of that monster inside you? Think of my good CRN day, Jordan.
Peter finally gets a look at the enemy he's been tracking, finding it's a red-headed young woman who isn't much older than he is. In time, Peter manages to put a name to the face, leading to two of the film's biggest bombshells.
One, she's Jean Grey, and her middle name is Elaine. Number 18, Black Panther for Kind of Forever. Comic book fans know that Namor's toes in line between good and evil and when he first showed up in Wakanda forever
He played the role of the bad guy and he did it incredibly well
Both he and his underwater kingdom of talakarn brought the fight to Wakanda and nearly took down Shuri who became the new Black Panther in this movie. Namor was vicious, arrogant, yet also incredibly strategic and powerful.
He was a ferocious force of nature and easily one of Marvel's most bloodthirsty kings.
Even though he was his first, Namor has sometimes been considered an Aquaman ripoff, but we doubt anyone's making that mistake now. wanted to see Namor in the MCU for years and his debut did not disappoint him.
Number 17 The High Evolutionary There are some villains who have justifiable motives for what they do, but not this guy. The very second we meet the High Evolutionary, we know he's one rotten apple.
Do you have it? He does not. Gaius, I tried to warn you, High Evolutionary. These guardians are more powerful than you think. Or perhaps you simply overestimate your own values. He's obsessed with experimentation and torturing innocent animals in order to achieve perfection.
He put Wacker Raccoon and others through misery and didn't have an ounce of compassion at any point. Other villains may have stylish debuts, but High Evolutionary has a cool and chilling introduction. He's simply an irredeemable person, and the whole time we're watching Guardians 3, we're just hoping Rocket will slice him to shreds.
Immediately from the beginning, we discover that the High Evolutionary is pure evil, and not many MCU villains can earn our hatred this quickly. Anything I've done, I've done for the betterment of the universe. These flash-time stories in better universes generally don't include much of Octopus's selling meth to guys with cockroach heads.
They do not Yes Doc Ock technically a villain from the Sam Raimi Spider movies which predated the MCU but No Way Home broke all the rules It folded him Green Goblin Electro and more into the mix
So when Otto showed up in the MCU to battle Tom Holland's Spider-Man, it was a spectacle. You should have killed your little girlfriend when I had the chance.
What did you just say? Looks like we've got competition. The multi-armed crazed genius brought the fight to Spidey and kept fans on the edge of their seats. Alfred Molina hadn't played Doc Ock in years, but once he returned for this movie, it was like he never missed a step.
While Otto became a good guy by the end of this film, he also proved he could still be a formidable foe. Maybe it's nostalgia, but this reintroduction was special. It's good to see you, dear boy.
It's good to see you. You know what's going on? How are you? Try to do better.
Number 15. The real Mandarin. Shang-Chi and the Legend of the Ten Rings. You know who I am? You don't know where I am. And you'll never see me coming.
While Trevor's flattery was a funny bait and switch, a lot of fans didn't like how Iron Man 3 reduced the Mandarin to a joke. Fast forward to Shang-Chi and that problem was eventually corrected.
Toadie Leong's Zou Wenwu arrives and fans rejoice because it meant that the real Mandarin was finally here.
And spoiler alert, he's awesome. The prologue immediately establishes the power he has and over the course of the movie we also see how much he cherishes his family. A lot of villains only care about themselves but not Wenwu.
The real Mandarin is such a breath of fresh air it's just a shame he never battled Tony Stark. If the MCU ever reboots Iron Man then he needs to fight this iconic rival. That's true.
Number 14, Killmonger, Black Panther. Michael B. Jordan's first time as a Marvel character with a human torch was a bumpy beginning. Thankfully, after Fantastic Four, his fire was rekindled,
and he got a second life in Black Panther as Harry Killmonger. How do you think your ancestors got these? Do you think they paid a fair price? Or did they take it like they took everything else? I'm going to have to get to leave.
You got all this security in here watching you ever since I walked in. You ain't checking for what you put in your body. All right, let's go. Come on. Killmonger was like nothing the MCU had seen up until this point.
He was a charismatic and strategic bad guy with motives that many fans resonated with. He wasn't just robbing museums or trying to take the throne for the heck of it. His ultimate goal was to empower the Disney franchise.
Killmonger wasn't just a cool bad guy. He was a mirror of T'Challa and someone who wanted to create a revolution. These details are what make him one of the most beloved villains in the entire Oseans.
Number 13. Agatha Harkness, WandaVision. Wanda Wanda...didn't think you were the open magical girl and child, did you? When we're first introduced to Agatha, she seems to be nothing more than a nosy neighbor played delightfully by Katherine Hahn.
That is, until she makes a much darker re-introduction towards the season end, where she's revealed that she is and always has been a witch, one with a great interest in Wanda's powers. While that's all kinds of sinister, it's the accompanying musical montage that really fills the deal.
Taking inspiration from the great surf rock songs of the past, as well as iconic spooky TV theme songs like The Addams Family and The Munsters, we get to see Abbott's work her magic behind the scenes and cause chaos for all involved.
Only ad-libs could get away with busting out a top charting song that ends with an omission of killing a dog. And I killed Sparky too. HAHAHAHAHAHA Number 12. Kingpin, Daredevil
Some might argue that a mob boss is an entire trope, but when Wilson Fisk shows up, we can't help but cower in fear. All that matters is...
How did they make you real? Kingpin's just that scary.
When he appears in Netflix's acclaimed Daredevil show, he's not sporting a stylish super villain costume or putting an affinity down there. He's just attending late night business meetings and, you know, ripping people's heads off with car doors.
He also manipulated FBI agent Benjamin Poindexter and indirectly created Bullseye, another iconic MCU villain.
Fist is evil, is methodical and calculated, but every so often the mask lifts and we get peek into his monster's rage. He not as powerful as Thanos but he easily one of the MCU best villains and that not an exaggeration
Number 11, Winter Soldier. Captain America, the Winter Soldier. Though Bucky Barnes is usually considered to be on the side of the angels, he spent a serious amount of time doing villainous things.
Case in point, his tenure as the Winter Soldier.
In the second Captain America movie, he revisits Bucky as a brainwasher fashion for Hydra. He coldly kills just about anyone in his way and brings the fight to Captain America and his allies. The Winter Soldier is a sleek badass to put it lightly.
Seriously, remember the scene where he catches Cap's shield like it's nothing? Words can't describe just how much aura this dude has.
Over the course of multiple movies, Bucky is eventually redeemed, but ultimately his past absence as Winter Soldier have had devastating effects on the MCU. Number 10.
Arthur Harrow, Moon Knight. Cult leaders are always terrifying when it comes to the shingle hole they have over their disciples. Though Harrow takes things up a notch, giving his power to judge those for sins that have yet to come to pass. What a beautiful day.
It's like we're in heaven. I mean, it's not heaven, is it? The darkness. Sometimes it hides in our very hearts. We are here to make the earth as much like heaven as possible.
Who'd like to go first? Originally an avatar of Khonshu, he now serves Ami, who has no hesitation when it comes to killing those for what they may or may not do later in life.
This is the face of a good man. This is made abundantly clear as Steven Grant watches among the crowd as Harrow goes about judging members of his flock. While one gets off scot-free, another is not so lucky.
I believe you. But the scales see everything. Perhaps it's something that lies ahead. Oh, I wish you could live to see the world we make.
Yet Amit has decided. Harold may be charismatic, but it doesn't take away from his condoning of these mystical executions. Number 9. Mysterio, Spider-Man Far From Home. When we're first introduced to Quentin Beck, he easily falls into the archetype of the
typical hero indistinguishable from the rest, seeking aid from Peter Parker while filling the hole of a mental figure left behind by Tony Stark. That is, until his true colors are revealed. See, that wasn't so hard.
Mysterio switch up as the film's antagonist was wild, even for those familiar with the comics. A master illusionist, Beck swiftly showcases that, in reality, he's a shallow, egotistical sore loser with one hell of a vendetta against Stark.
The man who brought us all together, our former boss, Tony Stark. Woo! Eject your feet! The change is sudden, sharp, and somehow grossly endearing. He made a fool of everyone and relished every moment of his deception.
With our technology and with Eden, Mysterio will be the greatest hero on Earth. Then everyone will win.
Number 8. Gore. Thor, Love and Thunder. Anyone who's anyone would tell you that Gore was by far the best part of Thor's ill-fated mortality, with an origin story bound in grief. We have lost everything, my lord.
The land is dry. Life is lost. But our faith in you never wavers and now we await the promise. Our faith in the Lord.
It's a funny celebration. He thinks there's an eternal reward. After his daughter died from the inhospitable conditions of their home world, a distraught Gorr comes face to face with his own God,
who is less than sympathetic to his plight. Oh my God. Your empire is over the edge. There's no one left to worship you. There'll be more followers to replace you.
There always are. Enraged, Gorr decides to go all in on Deicide, using the power of the Necro Sword to slaughter the Deity then and there before setting out on a god killing crusade. Number 7.
Cassandra Nova, Deadpool and Wolverine. When your interest consists of walking out of Ant-Man's giant skull, poking Deadpool's brain with bare fingers and instantly removing the skin from Johnny Storm's body, you know I know you've met a villain that's not to be trifled with.
You're one of Xavier's. You know him? You know Chuck? Oh, I knew him. We shared a wound. Tried to strangle the sly little fellow with my umbilical cord. Amen. I've never loved roommates.
As the twin of Charles Xavier, Cassandra has unmatched telekinetic ability. The kind that allows her to destroy even a pair of mutants with extreme self-regeneration. I can wield my power here without shame.
Unfortunately, I had no Charles Xavier to teach me temper. With hardly any effort at all, she breaks down both Wade and Loki, forcing them to flee with their tails between their legs. Too bad Johnny wasn't as lucky. Well, this isn't fun, but the big guy needs to eat and the rent is due.
By the way you the rent Number 6 Hela Thor Ragnarok Moments after Odin death Thor and Loki are greeted with the unexpected and unwelcome sight of their sister the infamous goddess of death How are you going?
Just show me what it's like to see one. who wastes no time in revealing just how powerful she really is. Neo, thank you, Father.
Mew. When you can stop Mew and Mare one handed before crushing it to smithereens, you've earned the right to be smarminest incarnate. You're impossible. Son, you have no idea what you're talking about.
Of course, Hela was only just getting started since she not only sent both brothers tumbling through the Bifrost, but went about laying waste to Asgard by her own team. Down Bear 5, Ronin, Guardians of the Galaxy. They call me Terrible, Radical, Zealot, because I obey the ancient laws of my people the Kree.
There are Kree Zealots and then there's Romans. The Accuser is almost single-minded in his hatred towards Xander and Kree superiority, which he demonstrated in his first scene in the bloodiest way possible. You will never rule Xander. No. I will cure him.
After going through his daily ritual and adorning himself in his classes, look, Ronin wasted no time in bringing the hammer down on a captured Nova Corps member. It is brutal. And let us know that mercy is not a word that exists in Ronin's vocabulary.
I promised Thanos I would retrieve the old for him. Only then will he destroy Zendor for me. Number 4, Loki, The Adventures. It's good to have you back. Now, if you'll excuse me, I have to destroy Young Ty.
Don't get us wrong, Loki's debut in the first Thor movie was solid, but while that was where it all began, his reintroduction in Avengers is what we really want to talk about. From a spoiled prince to the leader of an alien invasion, Loki had a noticeable level
up in this crossover movie. With the Chitauri army at his disposal, he waged war on New York and proved to be so dangerous that the Avengers would need to finally come together to take him down. I thought you dead.
Then you won't. You'll be. I'll bother your father. Throughout all this, Loki was a truly vicious and vindictive villain. Don't forget that there's a moment where he gouges somebody's eye out without a single care in the world.
God of Mischief? Yeah, more like God of Mass Destruction. Number 3. The Void. Thunderbolt. Poor Bob. The guy just wanted to find some peace and become a better person. but in the end was consumed by his trauma.
Unfortunately for the rest of the world, his trauma happens to be a superpowered physical manifestation known as the Void. I am... the Void. Pitch black with lifeless eyes, the Void is the embodiment of crushing despair.
As soon as it's released, it wastes no time in dragging everything in view into its darkness, locking them away in prisons formed from their own shame. We can't stop it alone. No one can.
It's a horrifying process with its roots buried in reality, which is what makes this amalgamation of negativity so damn imposing. What's with you, Lord of the Waste? You can't tell me I'm the ending.
Now versus Ultron, Avengers Age of Ultron. No. How could you be worthy? You're all killers. An insidious artificial intelligence who decides humanity is worth exterminating after only
a few seconds browsing the internet. That's Ultron at its core. Overwhelming intelligence without a trace of empathy. I'm only a hundred and ten pieces of our time. As for its intro, it easily steps into the waters of horror.
Can you imagine a more haunting sight than a shell of a broken piece of Iron Man armor crawling into view, waxing poetic about its murderous intentions before peacing out by singing Pinocchio? Kabargo with James Spader's mesmerizing performance, and you have a villain to remember.
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Number 1. Thanos Avengers Infinity War. For years, the Mad Titan had been hinted at as the ultimate big bad. The endgame, if you will. Destiny arrives all the same.
And now it's here. Or should I say... I am. He had brief appearances here and there, But nothing could have prepared him for when the boss man showed up to put his plan for universal genocide into motion.
In a single stroke, he wipes out the Asgardian refugees, kills both Heimdall and Loki, reclaims the space zone, and breaks Thor physically and mentally. I'm dying.
You should choose your words more carefully. Oh, he also bodied the Incredible Hulk like he was a ragdoll. There are flexes, and then there's this. No resurrection, Mr. Tosh. Are there any epic MCU villain intros we missed?
Share all the hype moments down in the comments below and don't forget to like and subscribe for more WatchMojo videos.