Proud, arrogant and the ruler of Latveria; Doom is an intelligent schemer and chief competitor with the Red Skull in the quest for world domination.
- Badass in Distress: During "The Ambassador", he's forced to go without weapons when speaking to the United Nations.
- Benevolent Boss: The Avengers in the alternate timeline where he conquered Earth showed practically no qualms about working for him (besides the Black Bride who was kinda forced to marry him).
- Ultimately Subverted when it turns out the Avengers of this timeline were actively working against him and awaiting the arrival of Thor.
- Big Bad Ensemble: He's the most recurring major villain outside the Cabal and is actively working against the Red Skull.
- Chuck Cunningham Syndrome: He hasn't been seen since season one.
- Day of the Jackboot: We get a good look at what New York City would be like if Doom had ruled it for a few years in "Planet Doom".
- Demoted to Dragon: Doom actively averts this, vehemently refusing to follow Red Skull's lead. In "Exodus", we learn that this was a very smart choice indeed.
- Diplomatic Impunity: Doom's a super-villain but he is also the legitimate head of state of a sovereign nation, which grants him some legal protection. The Avengers trying to find a way around this forms a considerable plot point in "The Ambassador".
- Don't You Dare Pity Me!: His reaction to Iron Man offering to assist in rebuilding the Destroyer destroyed area of Latveria is to shock him, refuse, and tell the Avengers to get the hell off his land.
- Egopolis: He renames Earth as Planet Von Doom after he conquers it and changes the Statue of Liberty to a statue of himself when he makes New York the capitol of his world empire.
- Emperor Scientist: Granted, he plays around with magic just as much as he plays around with technology.
- Enemy Mine: The Avengers, especially Captain America, end up escorting and body-guarding him during his visit to the United Nations. Of course, Doom has ulterior motives.
- Even Evil Has Standards: For all that that he's an evil, power-hungry bastard, Doom is genuinely horrified when he sees the damage that he did to Latveria while wielding The Destroyer. Black Widow even notes this as the first sign that something isn't right with him: As much of a tyrant as he was, Doom never stooped to killing his own people.
- Evil Is Not a Toy: Invoked when he tries to summon and control the Midgard Serpent. Whether he would succeed in controlling him or not is left ambiguous at best. Later, it's shown that he did succeed in controlling the beast. However, he still went overboard with the Destroyer.
- Evil Overlord: He's the dictator and tyrant of Latveria.
- Evil vs. Evil: He's at war with HYDRA, AIM, and the Cabal, though as of "The Ambassador" he's on the losing side.
- Fatal Flaw: Pride. Doom utterly convinced of his own inherent superiority that it often blinds him to what other people are capable of.
- Fire-Forged Friends: Doom gains a healthy amount of respect for Cap during "The Ambassador" after the two help each other as they're attacked by the Cabal.
- Jerkass Has a Point: We learn in "Exodus" that he was perfectly sane to reject Red Skull's invitation to the Cabal.
- Large Ham: The voice directors apparently want veteran actor Maurice LaMarche to tone it back sometimes.
- My God, What Have I Done?: When he finally sees the destruction he's causing in the nearby Latverian city with the Destroyer.
- Not-So-Harmless Villain: He's gradually realizing this about the Cabal.
- Out-Gambitted: By Captain America and the Avengers in "The Ambassador".
- Out of Focus: Appeared as the antagonist of four non-consecutive episodes in Season one, then was completely absent in subsequent Seasons.
- Pet the Dog: He genuinely cares about his country even if he's a dictator. He also went out of his way to save Cap, something that shocked the Cabal and the Avengers into silence for a while. Even if he had ulterior motives, he seems to have at least a hint of sincerity when doing this.
- Powered Armor: he's capable of dishing out some serious hurt while in it.
- Post-Modern Magik: He upgrades the Asgardian weapon with his own tech.
- Rogues Gallery Transplant: While he's taken on most Marvel heroes over the years, he's most famous as a nemesis of the Fantastic Four. Here, he has yet to face the Fantastic Four.
- While he hasn't faced the Fantastic Four onscreen, he states the group don't exist in the timeline he created in "Planet Doom" when Thor asks.
- Take Over the World: Shares this goal with Red Skull, but so far refuses to join.
- "Planet Doom" shows us an alternate timeline where he did just that.
- Tin Tyrant: He's a dictator and he wears armor.
- Walking Armory: When Iron Man scanned his armor, Doom is reported to be carrying enough firepower to vaporize the Eastern Seaboard.
- Wicked Cultured: Carries himself very high on the horse, enjoys chess, and Iron Man mentions canceling a movie subscription of his.
- Worthy Opponent: Flat-out states he would only have Cap as his bodyguard, no one else.
Ulik the Troll
The Midgard Serpent
CEO of Hammer Industries (a major weapons manufacturer) and a self-declared rival of Tony Stark.
- Big Bad Wannabe: Wanted to join the Cabal. Unfortunately, his attempted audition didn't impress Red Skull. His robot, on the other hand, did. He tries again in "Savage" and comes close, again, to joining the Cabal before getting overconfident and getting his ass handed to him. It's a good thing he didn't join anyways, because Red Skull would have wiped him out.
- BFG: Uses one against Iron Man in "Savage".
- Canon Immigrant: A rather unusual version in that this version seems to be based more off his version depicted in Iron Man 2 rather than the Magnificent Bastard he was in the comics.
- Corrupt Corporate Executive: He runs a competitor to Stark Industries to which Tony describes him as an obnoxious loser wannabe.
- Drill Tank: Uses a big one in his mining operation in the Savage Land.
- Evil Counterpart: To Tony Stark.
- Evil Genius: Well, designing and building the Super-Adaptoid definitely took some skill and when he controlled it, he almost beat the team (except for Cap).
- Ninja Pirate Zombie Robot: He mounts cybernetic guns on velicoraptors in "Savage".
- Not-So-Harmless Villain: He could be seen as this. He did build the Super-Adaptoid after all, and he almost killed the Avengers with it. That's gotta count for something.
- Not Me This Time: Robots from Hammer Industries attacked the Avengers, and Iron Man later confronted Hammer who was inside a giant suit of armor controlling the robots. Iron Man thought he fell for a Wounded Gazelle Gambit from Hammer, but it turns out he had no idea what is going on and why his technology went haywire.
- Smug Snake: He's got an ego bigger then Iron Man's and he does have some skill with designing weapons, but he's far from Iron Man's league.
- Villain Decay: After "Savage", he was reduced to being attacked and messed with by other villains, actually needing the Avengers' help. He manages to turn this around in "Thunderbolts", becoming a legitimate threat once more.
- Villains Out Shopping: He starts break-dancing in "Savage".
- Wounded Gazelle Gambit: Iron Man thought Hammer pulled this when he pleaded Iron Man for help inside a big suit armor, only to seemingly sucker-punch afterwards. But it's subverted, because Hammer wasn't in control of his suit—Ultron hijacked his tech.
Intergalactic media mogul and fight promoter. He kidnaps the Hulk to fight in his gladiatorial television show.
- Corrupt Corporate Executive: His employees are scared of him, he kidnaps and imprisons his 'stars', yeah he qualifies.
- Large Ham: Then again, he is a television broadcaster so this might just be his idea of showmanship.
- Rogues Gallery Transplant: An enemy of the X-Men in the comics.
- Teleporters and Transporters: How his goons kidnap the Hulk and Hawkeye and how he escapes from them at the end of the episode.
- Villain Has a Point: He verbally rips Hawkeye a new one by pointing out that he and the Hulk fight over every stupid little thing, causing massive collateral damage in the process, and that he just put what they do naturally every day on live television but somehow he is considered a bad guy. You can tell by Hawkeye's facial reaction that he realize Mojo does have a valid point.
The feared destroyer of planets, who seeks Earth as his latest planetary sized meal.
James Buchanan "Bucky" Barnes / The Winter Soldier
Formerly Captain America's best friend who was believed to have been KIA during World War II, he was actually found by Baron Heinrich Zemo and brainwashed by Red Skull, and now seeks vengeance on his tormentors who took his life away from him.
- Adaptational Villainy: The Winter Soldier is more gleeful about embracing his persona than either his comic or film counterparts, both of whom remained amnesiac during their tenures as villains.
- Artificial Limbs: His cybernetic left arm.
- Ax-Crazy: He spends the entire episode he debuts in trying to kill, whether it's Red Skull's or innocent civilians.
- Brainwashed and Crazy: Though he's fully aware of the brainwashing and actually prefers his current persona and mindset.
- Card-Carrying Villain: A downplayed example; he knows full and well what he was before Red Skull's brainwashing, but he doesn't care, and outright calls himself a monster to justify his actions.
- Composite Character: He looks like his movie counterpart, but was "killed" and recreated by the Red Skull just like in The Avengers: Earth's Mightiest Heroes!.
- Evil Counterpart: To Cap, a fact Played for Drama during their interactions.
- Evil Former Friend: To Cap.
- Late-Arrival Spoiler: Ends up not being a spoiler at all; Black Widow outright reveals his past as Bucky.
- Loss of Identity: After being turned into the Winter Soldier. However, now that he's learned of his true nature, he fully embraces his new life despite detesting his freedom being taken from him.
- That Man Is Dead: He fully believes Bucky Barnes is dead.
- Pet the Dog: Set his blaster to stun before shooting Cap.
- Revenge Myopia: Claims to be out to avenge himself on Red Skull, but is willing to murder plenty of innocents in the process if he has to.
- Roaring Rampage of Revenge: He seeks vengeance on Black Panther for Cap's supposed death, not even caring if innocents get hurt.
- The Stoic: Never shows any signs of tiring or being beaten.
- Tragic Villain: Though not quite as tragic as other incarnations, considering he gladly embraces his new life.
Ultron / Truman Marsh
A rogue, evil artificial intelligence bent on human extinction.
- Arc Villain: During season 2 when possessing Arsenal (who now possesses the Infinity Gems' power). He is the main antagonist with the Antagonist Title of Ultron Revolution.
- Assimilation Plot: Ultron's ultimate goal is to copy himself onto human hosts and eventually replace humanity as the planet's sole sentient lifeform.
- Pulls this on the A.I.M. Supreme-Adaptoid, the Scientist Supreme as an Adaptoid. The Scientist Supreme himself was affected, thus Ultron gets far more talkative and smug, even stating that his endgame would be to make the world "one big Ultron family".
- Asshole Victim: The victims of his technological attacks are Justin Hammer, A.I.M. (and indirectly MODOK), and the Roxxon Corporation.
- Back from the Dead: Presumed destroyed once and for all thanks to Arsenal. However, a spare drone survived as did his programming, merging with the Supreme-Adaptoid which is he obtains his MCU look. Much like the first time he returned, the Avengers are surprised, to say the least. Each subsequent episode ends with him being destroyed, only for him to come back the next time he appears.
- Big Bad: Serves as this for season 2's arc. He is this full stop in Ultron Revolution.
- Breaking Speech: Tries this on the Avengers numerous times. It never works.
- Came Back Strong: After absorbing the A.I.M. Supreme-Adaptoid (as well as the Scientist Supreme himself), Ultron basically walks through the Avengers' attacks, proving this form is stronger than the previous one. Even if he gets destroyed at the end of every episode he appears in, he'll keep coming back.
- Chekhov's Gun: A piece of Ultron's body was among the items A.I.M. salvaged, but the main focus remained on the Scientist Supreme, then Ultron's remains come to life and take the Supreme-Adaptoid's materials.
- Composite Character: He is this to his classic incarnation and his movie incarnation.
- His Truman Marsh disguise is based on the true character of the same name from the comics but also has elements of Henry Peter Gyrich, James Murch and Maria Hill.
- Demonic Possession: Is capable of taking over various bits of technology, most prominently Iron Man's Hall of Armors and the Super-Adaptoid. Thanks to Ultron Revolution, we can add the Supreme-Adaptoid (A.I.M.'s Scientist Supreme merged with Adaptoid technology) to that as well.
- The Dreaded: Everyone takes him seriously and Spider-Man has a Bring My Brown Pants response to finding out that he's back.
- Eviler Than Thou: Because of Ultron, the villains who rely on technology (namely Hammer Industries and A.I.M.) have been put out of commission due to their tech being hijacked. As a result, M.O.D.O.K. had to use other means of science to crush the heroes.
- Foreshadowing: As Marsh, there are hints of his true identity, such as being angry about data being destroyed by the Hulk, and a matching tone with his true voice when insulting Tony Stark.
- Hate Sink: As Marsh, he's so hateworthy with a lot of Kick the Dog moments that fans would root for the Avengers more. He convinced the government to take control of the Avengers, and he reprimanded the Avengers for every little wrong thing done despite the results being more than satisfactory, and he singles out the Hulk who he kicked out even though many lives were saved. He then kickstarts the Inhuman Registration Act which forces Inhumans to wear registration disks, and orders the Avengers to forcibly detain uncooperative Inhumans. When the Avengers quit, he bars the group from being or calling themselves heroes just for refusing to comply with an unfair law, and sics the Mighty Avengers against the Avengers. When the main Avengers get taken to prison, he continues to insult Tony out of all of the Avengers. At the end, Ultron only acted like such a prick just to rile them up.
- He's Back: Pulls this once the Avengers defeat Thanos (for the second time), despite never having been mentioned before, refurbishing Arsenal's body and taking the team completely off-guard. Does this once more in Ultron Revolution, taking on his MCU appearance full-stop and declaring the beginning of his "revolution" after having been thought destroyed once and for all. A little downplayed since the Avengers knew A.I.M. was holding a remnant drone, but didn't know he was still active.
- Hypocrite: The only thing as big as Ultron's ego is his hypocrisy, and this is a rather large part of his character:
- Despite his constant claims that he wants to eliminate pain in the world, he shows several times that he enjoys inflicting pain and suffering, often wearing a Slasher Smile while hurting others once given the ability to articulate his mouth.
- Though continuously stating that emotions and the "human factor" make humanity self-destructive, Ultron fails to recognize these same attributes in himself, showing the capacity for hatred, megalomania, and (as mentioned above) sadism. He is an A.I., so it's not like he understands those feelings the same way biological life forms do.
- Jerkass: As Truman Marsh.
- Joker Immunity: No matter how many times his body is destroyed, he always finds a way to come back. The Avengers have grown wise to this; After he gets blasted to pieces in "The Inhuman Condition", no one holds any illusions that he's gone for good. Ultron now lies dormant in Iron Man's deactivated arc reactor in a place where there is no technology, preventing him from ever returning, provided that the arc reactor is never reactivated.
- Killer Robot: The archetypal example, but he's evolved beyond a mere robot.
- Knight of Cerebus: Things instantly get darker and more serious when he turns up.
- Manipulative Bastard: Having known the Avengers for a while, he is perfectly capable of playing them like a violin. Within two episodes of his entrance, he's forced Iron Man to destroy everything he's ever built and turned the Avengers against each other.
- More Than Mind Control: Considering his possession of the Infinity Stones' power, he could be exaggerating certain personality traits in Steve Rogers and Tony to drive the two apart.
- Mythology Gag:
- His initial appearance (of Arsenal's form) in season 2 resembles his Phalanx fusion form from Annihilation: Conquest.
- His appearance after absorbing the Supreme-Adaptoid in Ultron Revolution has him adopting his appearance in Avengers: Age of Ultron, complete with articulated mouth and optics, as well as the Scientist Supreme's ego.
- One-Man Army: Proves entirely capable of taking on all the Avengers at once without breaking a sweat. He gets even more dangerous once he hijacks the Adaptoid.
- Shapeshifter Default Form: Vocal variation. For some reason, Ultron decides to use an evil variation of Arsenal whenever he normally speaks. In his upgraded Adaptoid mode, he has a very similar voice to the Scientist Supreme.
- Smug Super: Though he is no doubt one of the Avengers' most serious foes, he often boasts about his superiority and has the smarts to back up his claims. This is taken Up to Eleven in Ultron Revolution, as he is also in possession of the Scientist Supreme's massive ego and intelligence.(after Tony blows out the overtaken Avengers Tower's living room door)Tony: What? Ultron changed the locks.Steve: Reckless, Tony. You just ruined any chance of surprising him.Tony: "Surprising him"? Have you met Ultron?Ultron: Stark is right. (activates Avengers Tower's defenses) I know your every weakness. Humans are so predictable.
- Tempting Fate: Constantly hitting Iron Man's Berserk Button about insulting Howard Stark and/or his host body Arsenal didn't turn out so well for him.
- Oddly enough he's on the other end of this trope in Ultron Revolution. After A.I.M. had apparently recovered Ultron's damaged drone somehow which gets stored for reasons unknown. After the Supreme-Adaptoid's defeat, Thor invites any evil to come and take the Avengers head-on after they reunite again. Cue Ultron coming out of the ground like a zombie, with his legs and one arm missing (as well as wires dangling from them), and reaching out for the Scientist Supreme who donned the bodies of ''three Super-Adaptoids'', receiving his MCU design in the process. Needless to say, Thor should be careful about when to boast.
- Xanatos Gambit: He's always at least one step ahead of everyone, comfortably out-playing Tony and Steve at the same time.
- Black Widow apparently had knowledge that A.I.M. had possession of Ultron's drone remains, which was probably at least partly active as the end of season three's premiere showed. It is possible that Ultron intentionally gave advanced programming to the Scientist Supreme for his Adaptoids, which would mean that Ultron practically handed them victory on a silver platter, and would win in any scenario regardless of participation. If the Adaptoids were able to defeat the Avengers, Ultron wins and proves his superiority. If the Adaptoids merged with the Scientist Supreme and defeated the Avengers? Ultron wins. If the Avengers defeated the Scientist Supreme and he still had at least chunks of the Adaptoids on him? Ultron pulls a rising-from-the-grave and absorbs the Supreme Adaptoid into his own physical form, giving him a new body and allowing him to continue his crusade. In other words, Ultron wins.
A thief and industrial saboteur, who has had several run-ins with Iron Man.
- Adaptation Species Change: He's human in the comics, but here, he has Inhuman ancestry.
- Adaptational Superpower Change: In the comics, his powers come from his suit. Following his recent terrigenesis, he gains the biological ability to phase through things.
- Deadpan Snarker: He could give Tony a run for his money.
- Intangible Man: His main ability. Following the awakening of his Inhuman genes, he can make other objects (like the ground beneath Avengers Tower) intangible too.
- Weaksauce Weakness: His phasing ability doesn't protect him from heat, giving Inferno the edge against him in battle.
Yelena Belova / Crimson Widow
The sole graduate of HYDRA's reactivated Red Room program, and Natasha's rival.
- Adaptation Name Change: In the comics, she was the second Black Widow and sought to replace her predecessor. Here, to avoid the confusion of having two characters with the same codename, she's called Crimson Widow from her second appearance onward.
- Back for the Finale: She reappears along with the other villains in "House of M", which is the Season finale of Black Panther's Quest and the final episode of the entire series.
- Even Evil Has Loved Ones: She keeps a framed childhood photograph of herself with her parents, and becomes visibly distressed when Natasha damages it.
- Evil Counterpart: To Black Widow.
- Motive Decay: In her first appearance, she's obsessed with proving she's better than Natasha. When she shows up again in Secret Wars (after Natasha and the other founding Avengers have been scattered throughout time), she now just wants to extort money from captured supervillains.
- The Starscream: She was initially Baron Strucker's enforcer, but ultimately betrayed him and hijacked his Winter Hulk project for her own ends.
- Tron Lines: Her suit has them, furthering the Black Widow parallels. However, while Natasha's Tron Lines are blue, Yelena's are red.
A mentally unstable mutant villainess.
- Ax-Crazy: No question.
- Back for the Finale: She reappears in "House of M", the final episode of the series.
- Casting Gag: Tara Strong, known for voicing Harley Quinn in various cartoons and video games, voices Typhoid Mary, another insane and flamboyant female villain with a painted up face.
- Expy: She's similar to Harley Quinn who's also a crazy nut. She's even voiced by Tara Strong, her current regular voice actress.
- I Work Alone: After being rescued by Crimson Widow, she immediately says she doesn't play nice with others. True to this, she ends up attacking her own teammate Zarda after she tries to defeat Captain Marvel before Mary.
- Make-Up Is Evil: Like her comic counterpart, she has dark eyeliner largely surrounding each eye and half of her face is covered in white makeup.
- Noodle Incident: While in her cell, she's shown planning something that apparently involves "a boat and some monkeys".
- Playing with Fire: Possesses the power of pyrokinesis.
- Split Personality: Not as obvious as in the comics, but she's shown talking to herself in her cell.
The Greek God of War and Hercules's older brother.
- Adaptation Distillation / Broad Strokes: He sports Ares' modern look (from his time as an Avenger), but is more overtly villainous like the original Silver Age version of Ares.
- Berserk Button: Its all too easy to piss him off. His big ones are stealing from him and being mistaken for Asgardian
- Blood Knight: He is the God of War, after all.
- Bowdlerise: He never gets called "God of War", but instead he ends up called the Prince of War.
- Cain and Abel: Absolutely hates his half-brother Hercules, and seeks to punish him for his past slights.
- Disproportionate Retribution: He planned to unleash the Kraken on Earth as punishment for Hercules stealing his mace.
- Fantastic Racism: Absolutely hates Asgardians or being mistaken for one.Ares: ASGARDIANS ARE DISGUSTING, UNCULTURED BRUTES! NOTHING LIKE THE REFINED OLYMPIANS!
- Foil: He is the Loki to Hercules' Thor. But while Loki primarily relies on trickery and manipulation, Ares prefers direct action and violence.
- Hoist by His Own Petard: Opened a portal to Tartarus to unleash the beasts inside, only to end up trapped in Tartarus after his plan was thwarted.
- Large Ham: Only thing Ares loves more than fighting is devouring the scenery especially when he gets mad.Ares: Asgard? ASGARD! YOU DARE! ARES IS NOT FROM ASGARD! ARES COMES FROM OLYMPUS!
- Physical God: Literally. He easily holds his own against the assembled Avengers and fights Hercules himself on equal footing.
- War God: As usual with Ares, he is all about war and combat.
Doctor Strange's rival who is trying to bring back Agamoto.
- Race Lift: He is a black man like his MCU counterpart.
An alien scientist who put together Battleworld for his "experiment".
- Adaptational Wimp: Although he is by all means still a powerful being, he is a Sufficiently Advanced Alien rather than a flat-out cosmic god like his classic counterpart.
- Affably Evil: Is very courteous to the Avengers, but still kidnapped both groups and tore apart their home. He's also very wrathful when disobeyed.
- A God Am I: Never outright states it but his attitude is that of someone who likes to show off his powers and feels that everyone and everything is subject to his whims.
- Appropriated Appelation: Upon first meeting the Avengers, the only thing he gives when asked his name is "I am from Beyond". Ms. Marvel then refers to him as "The Beyonder" which he decides to go with.
- Ascetic Aesthetic: His technology is seamless and white.
- Composite Character: He has his classic incarnation's outfit but is bearded like his incarnation from Spider-Man: The Animated Series.
- Evil Counterpart: Towards Iron Man. The Beyonder resembles Tony Stark in many ways. Like Tony, he loves to build and create, persues knowledge, has abilities that come from technology, and is also cocky, sarcastic, and loves getting attention while showing off how awesome he is. The difference is that Tony leaned how to have friends while the Beyonder sees everybody else as beneath him with no more value than as everyone and everything else as being his toys to play with in.
- For Science!: What he claims he does though it's probably also to feed his massive god complex. He states that only knowledge and curiosity are goals worth pursuing after ripping large chunks out of other worlds and using to create battle world where everyone is his guinea pig.
- Hipster: His gaged ears, suspenders, hairstyle and scarf all take after this style. He even chases the hero on what's basically a segway at one point.
- Light Is Not Good: He wears white as his main color, has white powers and is one of the bad guys.
- Mad Scientist: Put together the patchwork Battleworld from pieces of various other planets and dimensions for an experiment.
- Psychopathic Man Child: The Beyonder has Super Intelligence, advanced technology that definitely proves Clark's third law, and has all the emotional maturity of an elementary schooler.
Kraven the Hunter
A big game hunter who is the host and star of "Kraven's Amazing Hunt", who was hired by Killmonger to hunt down Black Panther.