- Angst? What Angst?: Tony doesn't seem all that bothered by imprisoned in his own invention, his interaction with the outside world being limited, being reduced to a hologram, or the degree of Sense Loss Sadness that comes from being trapped inside a DISK.
- Audience-Alienating Premise: Despite the surprisingly good quality of the overall story and characters, the very premise of superheroes being treated like Mon cost the show many potential fans.
- Broken Base:
- At the same level of Avengers Assemble, if not worse. That said, there are a few people who already consider it better than the aforementioned series, putting it close with The Avengers: Earth's Mightiest Heroes.
- The people who love it tend to cite that it's a lot better than the current Western cartoons which have all gained a notoriety for being some of Marvel's most contested animated series to date.
- Others dislike it for reducing The Avengers to a Mon style merchandising series. People counter this by stating that the series still focuses on them a great deal as characters rather than simply reduce them to being "toys".
- Cliché Storm: Other than the inclusion of Marvel Comics characters, the series follows many common tropes from other Merchandise-Driven Mon anime series, with a main lead who feels very similar in appearence (and personality) to Ash Ketchum or Tyson Granger.
- Complete Monster:
- Loki, The God of Mischief, is the Greater-Scope Villain of the series, and the most personal villain the Avengers ever duel. After a failed coup against his father Odin and half-brother Thor for the throne of Asgard, Loki organized a supervillain rampage on an entire city to serve as a distraction while he trapped much of the world's superpowered population inside DISKs, small devices that Loki plans to use to absorb the abilities of all these individuals to make himself all-powerful. To reclaim these DISKs after they are scattered, Loki regularly has his minions cause chaos and destruction in their quest for the DISKs, notably mind-controlling Hulk into destroying an entire city. Though seemingly defeated, Loki is revealed to have survived by making a deal with the lord of the Dark Dimension, Dormammu, promising to offer Earth to him in exchange for being allowed to rule over the tortured souls that will be left after Dormammu lays waste to the planet. As a backstabbing betrayer, Loki plays sympathetic to leave his enemies, often his brother, open to attack, smugly mocks his most loyal henchmen for trusting him when he leaves them to die, and even turns on Dormammu himself, absorbing his powers into himself and making one last attempt to kill everyone who would stand against him before moving on to dominate the entire universe.
- Red Skull has different motivations than usual, but as usual is still a monstrous, twisted maniac. Unlike most incarnations, who are obsessed with power and conquest, this Skull sticks out for being an evil-loving sadist who wants nothing more than to prove, once and for all, that depravity can win over goodness. With this mindset, Skull betrays his own allies and regularly tries to break the Avengers' spirits, all leading up to his master plan of blowing up the entire Earth in a suicidal mockery of all heroism and justice. Even when this is foiled, Skull continues to grow in wickedness by tricking the teen Hikaru into painfully erasing his own free will and compassion, before using the boy's declining life force as he catalyst to force the Avengers to fight to the death. After the Avengers outsmart him then demand he save Hikaru, Skull gleefully reveals that he knows of no cure, and used the prospect of one solely to see the sadness in their eyes when they learned the truth.
- The Dread Lord Dormammu, master of the Dark Dimension, is the Greater-Scope Villain for the final arc of the series, and stands out as perhaps the most depraved villain in the series. Using the Dark Dimension as a home, Dormammu constantly expands it by absorbing entire universes into it, which destroy everything residing in them while leaving the wailing souls of its inhabitants alive for Dormammu to torment to his contentment. Turning his attention toward Earth, Dormammu makes a pact with the treacherous Loki to deliver Earth to him in exchange for promising the God of Mischief a commanding position in his Dimension. A favorite tactic of Dormammu's when preparing to invade a dimension, one he performs on Earth as well, is to force illusions onto the planets' inhabitants to drive them into utter fear and despair, which Dormammu gains extreme pleasure from feeding upon, and goes so far as to drive a man into despair-induced insanity before using him as a slave.
- Ensemble Dark Horse: Deadpool, obviously.
- So Bad, It's Good: Many Marvel fans would have found the anime to have been less enjoyable if it wasn't for the presence of Deadpool, who constantly pokes fun on the anime production team on noting how bad the anime is, and being voiced by fan favorite veteran seiyuu Takehito Koyasu.
- They Wasted a Perfectly Good Character:
- The kids' second heroes are very underused. While some of them at least got introductory episodes centered on them, and their lack of appearances is somewhat justified to keep focusing on the main Avengers, there still are moments when they could be used. For example, when Ed briefly drops the Hulk DISK against Symbiote Spider-Man, he never thinks about D-Smashing Power Man instead.
- Doubles as a case of They Wasted a Perfectly Good Plot. Though Bucky is mentioned in most of Cap/Chris's story arcs, this is probably the only media to feature Cap in recent times to not show that Bucky survived and was brainwashed into becoming Winter Soldier especially after the success of Captain America: The Winter Soldier. Unknown how they could've fit it into the story, but it would've been interesting to see, along with Bucky possibly becoming a Fight Class hero as well.
- Unexpected Character: Most of the heroes and villains in the series are A-listers, or well-known B-list characters, but among them are also a few more obscure choices:
- Diamondback: This is her first animated apperance. Likewise: Cottonmouth.
- Noriko Ashida, aka "Surge", one of the newer members of the X-Men, later shows up after the group moves to Japan. Much like the use of Armor in the X-Men anime, she was probably chosen because the character herself is Japanese.
- Fin Fang Foom is not exactly a character many fans expected to see in the anime, and especially not during the Guardians of the Galaxy-story arc as a litteral dragon for Ronan.
- Even more obscure is the Bi-Beast, who made only a handfull of apperances in the main Marvel Universe and barely any apperances in other media.
- Pepper Potts turns out to be fairly important as the kids' "handler" as well. Likewise, Agent Coulson appears in the first episode as a SHIELD tour guide.
- Unpopular Popular Character: While not a lot of people in the anime like him (just like every other continuity he's in), Deadpool's appearance in the anime got fans excited.
YMMV / Marvel Disk Wars: The Avengers