History YMMV / MarvelUniverse

* [[Adorkable/MarvelUniverse Adorkable]]

** This actually has an in-universe explanation. The godlike aliens known as the Celestials went to various different planets and created on two different strains of races on them, the ugly shapeshifting Deviants and TheBeautifulElite PhysicalGod race called the Eternals (humans are a separate but related species predating both; [[Franchise/XMen mutants]] are an offshoot of separate Celestial experiments on humans). The Skrulls are descendants of alien Deviants while Thanos is a descendant of the Earth Eternals who was born with a mutation that makes him resemble the Deviants. Since his design is based on the unrelated DC character {{ComicBook/Darkseid}}, this is a marvellous case of CanonWelding.

* FanPreferredCouple: While Clint is probably Mockingbird's most popular shipping partner thanks to once being an OfficialCouple with him, she's got quite a few people who instead ship her with Franchise/SpiderMan, ComicBook/BlackWidow, and ComicBook/BuckyBarnes.

* WhatDoYouMeanItWasntMadeOnDrugs: Those still unfamiliar with Starlin's work on Thanos may have noticed by reading this page that his Thanos stories tend to have surreal, psychedelic imagery. That's because it's no secret that Starlin used to be involved in the New Age movement in the 60's, and was inspired by Steve Ditko's surreal artwork in Doctor Strange's comics.

* SpiritualAntithesis: Marvel like DC are the two longest comic book universes but the way they do things are different such as the DC heroes try not to commit morally questionable acts most of the time unless they have to while the Marvel heroes decide to commit morally questionable acts to save the ones they care about or the world. Most of the villains stay as straight-up bad guys most of the time while the villains in the DC universe try to change their ways and even become [[AntiHero anti-heroes]] at times.

* ContinuitySnarl: The animated Marvel Universe can sometimes be inconsistent.
** The first example is how in ''USM'' and ''AvengersAssemble'', the Guardians of the Galaxy originally shares the designs of their comic counterparts, however ''WesternAnimation/GuardiansOfTheGalaxy2015'' cartoon would later be established to share the same continuity as the as the previously mentioned shows, doesn’t make sense as their designs and personalities were designed to more closely resemble their MCU counterparts.
** Season 5 of ''WesternAnimation/AvengersAssemble'', "Black Panther's Quest" is a continuity nightmare. It's still officially listed as taking place after season 4, "Secret Wars," but several characters are missing without explanation. The crossover with Spider-Man features the Spidey of ''WesternAnimation/MarvelsSpiderMan'' and '''not''' ''[[WesternAnimation/UltimateSpiderMan2012 Ultimate Spider-Man]]'' (a change that also carried on into ''Guardians of the Galaxy'')! The changed character designs are also the same as in Spider-Man 2017. When T'Challa meets with Attuma in Atlantis, he's a completely different character from the tyrant in Red Skull's Cabal in the early seasons. It's like the shows just hopped universes between seasons.

* FranchiseCodifier: Several in fact.
** The Marvel Universe as a whole codified its cosmology with ''ComicBook/TheInfinityGauntlet'', a multi-issue epic which pitted the ''entire'' Marvel roster against the nigh-omnipotent [[Characters/MarvelComicsThanos Thanos]], who had collected the [[SetBonus six Infinity Gems]] and become the supreme being of the universe. This series has been referenced repeatedly since, with Marvel's pantheon of {{Cosmic Being}}s and other otherworldly powers remaining largely in tune with how they were established in ''Infinity Gauntlet''. Further, every CrisisCrossover event thereafter has followed the basic model of ''Infinity Gauntlet''. When Marvel Studios launched Franchise/MarvelCinematicUniverse in 2008, the ''Infinity Gauntlet'' storyline formed the basic outline of the Infinity Saga, the MythArc of the series until 2019.
** ''ComicBook/TheNightGwenStacyDied'' is considered ''the'' definitive Spider-Man story, and has gone on to define the entire franchise -- for better or worse. For better, because this story is largely credited with ending the Silver Age of comics and ushering the darker and more mature UsefulNotes/TheBronzeAgeOfComicBooks. At the time, it was considered ''unthinkable'' that [[ILetGwenStacyDie the hero's love interest would die]] in comics, but now all bets were off. Unfortunately, this also codified ''other'' things into the franchise, such as Spider-Man [[NotAllowedToGrowUp not being allowed to grow up too much]] or [[TrueLoveIsBoring stay married]], as Gwen was killed off for ''exactly'' those reasons. Also, her death helped usher in UsefulNotes/TheDarkAgeOfComicBooks, in which shock deaths and twists became the rule rather than the exception. In fact, ''ComicBook/TheCloneSaga'', widely considered the worst Spider-Man storyline of all time, was a direct followup to ''The Night Gwen Stacy Died''.
** Two stories have forever defined the ''Franchise/XMen'' franchise: ''ComicBook/DaysOfFuturePast'' and ''ComicBook/AgeOfApocalypse''. Both of these stories established TimeTravel and {{Alternate Timeline}}s as a massive part of the X-Men mythos, with almost every incarnation of the team learning of some sort of BadFuture in which [[RobotWar Sentinels]] and/or [[EvilOverlord Apocalypse]] has taken over the future, or a time traveler [[MakeWrongWhatOnceWentRight screwing up history]] so that they rule the ''present'' instead. Marvel has repeated the formula multiple times, including with the massive ''ComicBook/HouseOfM'', ''ComicBook/XMenSecondComing'', and ''ComicBook/AgeOfX'' storylines.
** ''ComicBook/TheDarkPhoenixSaga'' is another major story that forever defined the X-Men. In specific, it expanded their exploits into [[JustForFun/RecycledInSpace space]], and also introduced the concept of an X-Man becoming so powerful and/or unstable that they become a threat to the entire Earth or universe. Their complete failure to handle the situation well with Phoenix has led to multiple other stories where the team tries to catch the warning signs and resolve things before it's too late. To varying results.
** ''ComicBook/CivilWar'' was not a cosmic-scale crossover event, but it still managed to become Marvel's most successful one of all time. Its success opened the floodgates for many other storylines in the same vein, which pitted some or all superheroes [[GoodVsGood fighting each other]] instead of supervillains. From this, events such as ''Schism'', ''ComicBook/AvengersVsXmen'', ''ComicBook/SecretWars2015'', ''ComicBook/CivilWarII'' and ''ComicBook/InhumansVsXMen'' all featured teams or factions of heroes fighting against one another. Furthermore, 2020's ''ComicBook/{{Outlawed}}'' event would follow a similar story development, whereas some heroes (in this case, {{Kid Hero}}es) have become outlawed and must operate in the shadows or on the run.
** The second volume of ''ComicBook/{{Runaways}}'' may not have originated the team, but it did include many of the franchise's most famous arcs (like "True Believers" and "Live Fast") and was the series that officially made Nico the team leader, and revealed that Karolina is a lesbian. It also codified the AnyoneCanDie nature of the series; whereas the original killed off the villains in its penultimate issue, the second series killed off a major hero halfway through the run.

* CreatorsFavorite: After his original miniseries, Adam Brashear / Blue Marvel ''only'' showed up in works that Kevin Grevioux was writing, up until Al Ewing (who also seems to like the character) used the character as part of the ''[[ComicBook/MightyAvengers2013 Mighty Avengers]]'' lineup in volume 3, and later in ''ComicBook/TheUltimates2015'' and its follow-up series, ''Ultimates 2''. Very few other creators have ever touched the character.

* WhatMeasureIsANonBadass: Borders on out-of-universe OvershadowedByAwesome; due to not being one of the most well-known Avengers, and not appearing in the MCU until the second season of ''Agents of SHIELD'', Mockingbird is a very obscure character, and its not helped by the fact that Marvel have rarely given her much of a solo push independent of Hawkeye. As such, as well-received as she has been, there's been a VocalMinority of MCU fans who've quickly dismissed her on the grounds she's not Black Widow, and couldn't possibly be as good as Natasha for the simple fact she wasn't introduced with her.

* [[AudienceAlienatingEra/MarvelUniverse Audience-AlienatingEra]]