History Main / CrisisCrossover

The original was Marvel's ''ComicBook/SecretWars1984'', but the trend only really caught on with ''ComicBook/CrisisOnInfiniteEarths'', the event which changed Franchise/TheDCU so much that its history is permanently defined as "pre-ComicBook/{{Crisis|on Infinite Earths}}" and "ComicBook/PostCrisis". It went from April 1985 to March 1986, tying in almost every other series DC published at the time.

* ''Literature/TheStormlightArchive'' is basically this to the rest of Literature/TheCosmere setting, with planar champions and heroes from previous stories coming together to find Hoid and deal with a threat to the entire Cosmere. Numerous characters and objects from prior books are BackForTheFinale.

* A made-for-TV animated movie called ''WesternAnimation/TheManWhoHatedLaughter'' brought together a big group of ''newspaper'' comic strip characters -- ComicStrip/{{Blondie}}, ComicStrip/{{Popeye}}, ComicStrip/BeetleBailey, ComicStrip/HiAndLois, ComicStrip/SnuffySmith -- who are ultimately saved from a comics-hating villain by the combined forces of a group of newspaper adventure strip heroes (ComicStrip/MandrakeTheMagician, ComicStrip/FlashGordon, ComicStrip/PrinceValiant, ComicStrip/ThePhantom, and ComicStrip/SteveCanyon). All the characters are owned by King Features Syndicate.

* WebVideo/TGWTGYearOneBrawl, WebVideo/{{Kickassia}}, WebVideo/SuburbanKnights, and WebVideo/ToBoldlyFlee from the people at Website/ThatGuyWithTheGlasses.

* Invoked in-universe in ''Anime/ReCreators'', where in order to empower the [[RefugeeFromTVLand Creations]] against [[BigBad Altair]], the government formulates a plan to have their creators make a crossover event film in which the characters join forces to defeat Altair due to the fact that the Creations' power-ups rely on the [[ClapYourHandsIfYouBelieve general public to accept and embrace them]].

** ''Film/CaptainAmericaCivilWar'' crosses over the cast of the ''Captain America'' movies with the cast of the ''Avengers'' movies (sans [[ComicBook/TheMightyThor Thor]] and Comicbook/TheIncredibleHulk), as well as unaffiliated heroes Comicbook/BlackPanther, Film/AntMan1, and ComicBook/SpiderMan.

* The Phoenix Saga of ''WesternAnimation/XMenTheAnimatedSeries'' was a borderline example. Although there were no actual team ups, it used appearances of other Creator/MarvelComics characters to emphasise the seriousness of the whole thing. [[Comicbook/ExcaliburMarvelComics Captain Britain]] and Comicbook/DoctorStrange were seen reacting to the Phoenix and ComicBook/SpiderMan (albeit only his silhouette and his hand) and [[ComicBook/IronMan War Machine]] were seen protecting civilians in [[BigApplesauce New York]]. In the sequel, the Dark Phoenix Saga, Doctor Strange briefly appeared again, along with [[ComicBook/TheMightyThor Thor]], a Watcher and Eternity.

** ''Film/CaptainAmericaCivilWar'' crosses over the cast of the ''Captain America'' movies with the cast of the ''Avengers'' movies (sans [[ComicBook/TheMightyThor Thor]] and Comicbook/TheIncredibleHulk), as well as unaffiliated heroes Comicbook/BlackPanther, Film/AntMan1, and Franchise/SpiderMan.

* The Phoenix Saga of ''WesternAnimation/XMenTheAnimatedSeries'' was a borderline example. Although there were no actual team ups, it used appearances of other Creator/MarvelComics characters to emphasise the seriousness of the whole thing. [[{{Comicbook.Excalibur}} Captain Britain]] and Comicbook/DoctorStrange were seen reacting to the Phoenix and Franchise/SpiderMan (albeit only his silhouette and his hand) and [[ComicBook/IronMan War Machine]] were seen protecting civilians in [[BigApplesauce New York]]. In the sequel, the Dark Phoenix Saga, Doctor Strange briefly appeared again, along with [[ComicBook/TheMightyThor Thor]], a Watcher and Eternity.

** ''Time Lord Victorious'' (2019-22 -- intended to be 2019-20, but some works were delayed by the COVID-19 pandemic), which centered on the Eighth, Ninth and Tenth Doctors, and included ''Literature/NewSeriesAdventures'' novels, ''AudioPlay/BigFinishDoctorWho'' dramas, comic arcs in both ''ComicBook/DoctorWhoTitan'' and the ''Magazine/DoctorWhoMagazine'' comic strip, webcasts, [[NotMakingThisUpDisclaimer a T-shirt]], and two live theatrical events, ''A Dalek Awakens'' and ''Time Fracture''.

** ''Time Lord Victorious'' (2019-22 -- intended to be 2019-20, but some works were delayed by the COVID-19 pandemic), which centered on the Eighth, Ninth and Tenth Doctors, and included ''Literature/NewSeriesAdventures'' novels, ''AudioPlay/BigFinishDoctorWho'' dramas, comic arcs in both ''ComicBook/DoctorWhoTitan'' and the ''Magazine/DoctorWhoMagazine'' comic strip, webcasts, and two live theatrical events, ''A Dalek Awakens'' and ''Time Fracture''.

* The Franchise/DoctorWhoExpandedUniverse had a massive multi-media crossover event in 2019-22 (intended to be 2019-20, but some works were delayed by the COVID-19 pandemic) titled ''Time Lord Victorious'', which centered on the Eighth, Ninth and Tenth Doctors, and included ''Literature/NewSeriesAdventures'' novels, ''AudioPlay/BigFinishDoctorWho'' dramas, comic arcs in both ''ComicBook/DoctorWhoTitan'' and the ''Magazine/DoctorWhoMagazine'' comic strip, webcasts, and two live theatrical events, ''A Dalek Awakens'' and ''Time Fracture''.

* ''LightNovel/SDGundamTheLastWorld'' features characters from throughout the ''Franchise/SDGundam'' universe trying to survive an InvoluntaryBattleToTheDeath in the titular "Last World". To wit, alongside [[OriginalGeneration Sen-Pu Ninja Exia and Gundam the Gold]], there's also characters from the ''Knight Gundam'' series, ''Toys/BBSenshiSangokuden'', ''SD Command Chronicles'', ''Anime/SDGundamForce'', ''Gundlander'', and ''SD Gundam Space Time Transfer Gun Voyage'' just to name a few.

* The ''Majokko Club Yoningumi A-kūkan kara no Alien X'' OVA is a crossover between Creator/StudioPierrot's most successful MagicalGirl series. [[Anime/MagicalAngelCreamyMami Creamy Mami]], Anime/{{Magical Emi|TheMagicStar}}, [[Anime/MagicalIdolPastelYumi Pastel Yumi]], and Anime/{{Persia|TheMagicFairy}} all team up to fight alien forces on the moon.

* The ''Majokko Club Yoningumi A-kūkan kara no Alien X'' OVA is a crossover between Creator/StudioPierrot's most successful MagicalGirl series. [[Anime/MagicalAngelCreamyMami Creamy Mami]], [[Anime/MagicalStarMagicalEmi Magical Emi]], [[Anime/MagicalIdolPastelYumi Pastel Yumi]], and [[Anime/PersiaTheMagicFairy Persia]] all team up to fight alien forces on the moon.

* [[Myth/NorseMythology The [=Æ=]sir-Vanir War]], where the two pantheons of Norse gods the [=Æ=]sir and Vanir ([[MassiveMultiplayerCrossover whom some suggest originated from two different religions that was merged]]) fight and [[CanonWelding ultimately becomes one tribe]], and [[{{Gotterdammerung}} Ragnarök]], where characters from all over Norse mythology meet up to [[KillEmAll kill each-other]].

** ''Film/SpiderManNoWayHome'' is such a big Crisis Crossover that it brings together the characters, and therefore universes, of the ''Spider-Man'' films already in the Marvel Cinematic Universe (and also ''Doctor Strange'' with a cameo by Wong), with the two [[Film/SpiderManTrilogy cinematic]] [[Film/TheAmazingSpiderManSeries predecessors]] and pits the three Spider-Man incarnations against a LegionOfDoom consisting of most of their villains. [[spoiler: It also crosses over further with a mid-credits cameo of Tom Hardy's Eddie Brock and Venom.]]

The original was ''ComicBook/CrisisOnInfiniteEarths'', the event which changed Franchise/TheDCU so much that its history is permanently defined as "pre-ComicBook/{{Crisis|on Infinite Earths}}" and "ComicBook/PostCrisis". It went from April 1985 to March 1986, tying in almost every other series DC published at the time.

* The Phoenix Saga of the ''WesternAnimation/XMen'' animated series was a borderline example. Although there were no actual team ups, it used appearances of other Creator/MarvelComics characters to emphasise the seriousness of the whole thing. [[{{Comicbook.Excalibur}} Captain Britain]] and Comicbook/DoctorStrange were seen reacting to the Phoenix and Franchise/SpiderMan (albeit only his silhouette and his hand) and [[ComicBook/IronMan War Machine]] were seen protecting civilians in [[BigApplesauce New York]]. In the sequel, the Dark Phoenix Saga, Doctor Strange briefly appeared again, along with [[ComicBook/TheMightyThor Thor]], a Watcher and Eternity.

* ''Franchise/MarvelCinematicUniverse:''
** ''Film/TheAvengers2012'' is a crisis crossover for all [[Franchise/MarvelCinematicUniverse Marvel Studios movies]] starting with 2008's ''Film/IronMan1''. However, this was the plan from the very start, as it was first set up in TheStinger of ''Iron Man'' and just building with each new film released in the next three years.
** ''Film/AvengersAgeOfUltron'' reunites the team in reaction to events laid out in the intervening films, as well as being influenced by events in ''Series/AgentsOfSHIELD'' (though the Agents of S.H.I.E.L.D. don't appear).
** ''Film/CaptainAmericaCivilWar'' crosses over the cast of the ''Captain America'' movies with the cast of the ''Avengers'' movies (sans [[ComicBook/TheMightyThor Thor]] and Comicbook/TheIncredibleHulk), as well as unaffiliated heroes Comicbook/BlackPanther, Film/AntMan1, and Franchise/SpiderMan.
** ''Film/AvengersInfinityWar'' once again ties together various sub-franchises from across the MCU, including ones not included in the previous two ''Avengers'' films, in order to both deal with the GreaterScopeVillain of Phases 1-3 (namely ComicBook/{{Thanos}}), and to finally tie off the Infinity Stone MythArc that has been running through TheVerse since mid-Phase 1. It has the largest number of superheroes in any MCU film to date.
** ''Film/AvengersEndgame'' is the direct continuation of the events of ''Infinity War'', climaxing in a BigBadassBattleSequence between the Avengers and their many allies verses Thanos's army.
** ''Film/SpiderManNoWayHome'' is such a big Crisis Crossover that it brings together the characters, and therefore universes, of the ''Spider-Man'' films already in the Marvel Cinematic Universe (and also ''Doctor Strange'' with a cameo by Wong), with the two [[Film/SpiderManTrilogy cinematic]] [[Film/TheAmazingSpiderManSeries predecessors]] and pits the three Spider-Man incarnations against a LegionOfDoom consisting of most of their villains. [[spoiler: It also crosses over further with a mid-credits cameo of Tom Hardy's Eddie Brock and Venom.]]

** ''Film/UltramanTaigaTheMovieNewGenerationClimax'' takes it UpToEleven, with ''eleven'' Ultra heroes, from Ginga to Taiga, working in tandem in order to destroy the Malicious Demonic Monster Grimdo.

* Several in ''Roleplay/MarvelsRPG''.

[[caption-width-right:270: The ''Mini Marvels'' [[LampshadeHanging sum it up]].]]

* OlderThanFeudalism: The Myth/GreekMythology knows at least two major crossover events: the Argonautica (the story of Jason, the Argonauts, and the Golden Fleece) and the Calydonian Boar Hunt a few years later. Large arc-based events like the Theban Wars and the Trojan War may also count.

** ''Film/SpiderManNoWayHome'' is simultaneously a Crisis Crossover ''and'' an Intercontinuity Crossover. It brings together the casts of the MCU ''Spider-Man'' and ''Doctor Strange'' films (or at least Strange and a cameo by Wong). But it also unites the MCU incarnation of Peter Parker with his two [[Film/SpiderManTrilogy cinematic]] [[Film/TheAmazingSpiderManSeries predecessors]] and pits them against a LegionOfDoom consisting of most of their villains. [[spoiler: It also crosses over with Film/SonysSpiderManUniverse with a mid-credits cameo of Tom Hardy's Eddie Brock and Venom.]]

** ''Film/SpiderManNoWayHome'' is smultaneously a Crisis Crossover ''and'' an Intercontinuity Crossover. It brings together the casts of the MCU ''Spider-Man'' and ''Doctor Strange'' films (or at least Strange and a cameo by Wong). But it also unites the MCU incarnation of Peter Parker with his two [[Film/SpiderManTrilogy cinematic]] [[Film/TheAmazingSpiderManSeries predecessors]] and pits them against a LegionOfDoom consisting of most of their villains. [[spoiler: It also crosses over with Film/SonysSpiderManUniverse with a mid-credits cameo of Tom Hardy's Eddie Brock and Venom.]]