History Main / CrisisCrossover

* ''Series/{{CSI}}'' has been known to cross storylines and characters between its various incarnations, as has the ''LawAndOrder'' series. This most commonly takes place during sweeps.

* ''EndWar'' is one of these for the Creator/TomClancy [[TheVerse game verse]], including former members of the [[VideoGame//GhostRecon Ghosts]] and [[VideoGame/RainbowSix Rainbow]], along with [[SplinterCell Third Echelon]].

* ''EndWar'', now {{retcon}}ned [[CanonDiscontinuity out of canon]], is one of these for the Creator/TomClancy [[TheVerse game verse]], including former members of the [[Comicbook/GhostRecon Ghosts]] and [[VideoGame/RainbowSix Rainbow]], along with Third Echelon.

** The first debuted in Spring of 2013 is the so-called ''Age of Ultron'', bringing Ultron back, and the end of humanity with it. Interestingly, the storyline already starts off with Ultron succeeding in taking over, with the surviving heroes attempting to mount a resistance to stop the robotic villain's rule.

* 2012 brings us ''Comicbook/{{AvengersVsX-Men}}'', where the Phoenix Force is returning to Earth and has chosen Hope Summers as its new avatar, leading the two major {{Super Team}}s of the MarvelUniverse to clash over whether this will mean the resurgence of mutantkind (for the X-Men) or the destruction of humans and mutants alike (for the Avengers). Epic ConflictBall ensues.
* Marvel has two Crisis events set up for 2013.

*** Then it quickly turns into TimeyWimeyBall nuttiness.

** In ''Comicbook/{{Millennium}}'', the robotic Manhunters try to stop the Guardians of the Universe from giving a group of really bad ethnic stereotypes virtual Godhood; it doesn't work out. By contractual obligation, at least one secondary character from most of DC's titles turned out to be [[TheMole the Manhunters' moles]][[hottip:* :(In ''{{Superman}}'', basically all of Smallville but the Kents.)]], which was never mentioned again afterwords.

* The ''FanFic/PonyPOVSeries'' plays with this -- all four generations of ''MyLittlePony'' existed in the same timeline at different points [[spoiler: (until the Alicorns and Draconequi [[CosmicRetcon erased]] G3 to prevent [[TheEndOfTheWorldAsWeKnowIt universal collapse]]), but they never actually meet up. [[spoiler: Until the FinalBattle of the [[BadFuture Dark World]] timeline, when Twilight uses her connection with Minty Pie and the {{temporal paradox}}es created by [[BiggerBad Nightmare Eclipse]]'s GroundhogDayLoop plan to [[GondorCallsForAid summon]] the G1, G2, G3 and G4 (pre-Reign of Chaos) mane casts in order to use multiple sets of the Elements of Harmony to defeat Eclipse and her {{Psycho Ranger|s}} CoDragons.]]

** The first debuted in Spring of 2013 is the so-called Age of Ultron, bringing Ultron back, and the end of humanity with it. Interestingly, the storyline already starts off with Ultron succeeding in taking over, with the surviving heroes attempting to mount a resistance to stop the robotic villain's rule.

** The second debuting at the end of Summer in 2013 is ''Infinity'', building off a storyline from Comicbook/TheAvengers main book it centers around the two threats, one a new cosmic enemy called the Builders and an invading army lead by ComicBook/{{Thanos}}, hitting the planet at nearly the same time. Despite the name and use of Thanos, WordOfGod says that the event is not intended to be a sequel to the similarly named ComicBook/TheInfinityGauntlet.

* 2013 has scheduled the so-called Age of Ultron, bringing Ultron back, and the end of humanity with it. Interestingly, the storyline already starts off with Ultron succeeding in taking over, with the surviving heroes attempting to mount a resistance to stop the robotic villain's rule.
** Then it quickly turns into TimeyWimeyBall nuttiness.

* ''FinalCrisis'' (2008): Picking up at the end of the year-long weekly series ''Countdown to Final Crisis'' and a mounting sense of crossover fatigue among fans, it faced an uphill battle, but the strength of its writer and artist (GrantMorrison and J. G. Jones) saw it through to sales success. The newly reincarnated Darkseid [[RescuedFromTheScrappyHeap accomplishes his goal of ruling the human race]] as he unleashes the Anti-Life Equation on Earth, plunging Earth into a black hole that threatens to destroy the Multiverse. The heroes save all of existence, but at the high cost of several high profile casualties (including MartianManhunter and {{Batman}}) and lots of dead civilians who died while Darkseid reigned. Served as the final acts of the "Multiverse Trilogy" ("the [[TitleDrop Final Crisis of the Multiverse]]") and the "Exploration Trilogy" ("the day that evil won").

* And as long as we're being complete, there was the AmalgamUniverse story, in which both the Marvel and the DC multiverses face annihilation -- and so the two multiverses were forcibly merged for a short time to keep their worlds alive. (Amalgam Dark Claw = DC {{Batman}} + Marvel {{Wolverine}}; Amalgam Super Soldier = DC {{Superman}} + Marvel CaptainAmerica; Amalgam Amazon = DC WonderWoman + Marvel {{Storm}}; Amalgam Lobo The Duck = DC Lobo + Marvel Comicbook/HowardTheDuck; Amalgam Captain Marvel = DC [[{{Shazam}} Captain Marvel]] + Marvel CaptainMarVell; et multiple cetera.)

* In 2000, in an effort to promote ''ComicBook/YoungJustice'', DC produced "Sins of Youth," a special Crisis Crossover in which Young Justice, the JLA, the JSA, the Titans and as many others as the pencilers could cram into frame descended on the White House lawn for a rally, only to face the mother of all ThirteenGoingOnThirty/FountainOfYouth plots wherein nearly every character present was aged or de-aged. It only interrupted the monthly run of YJ and crossed over into Superboy, and was over within a month real-time, but the scale of the story and the villains' plot was worthy of this trope.

* The year 2004 had a rather ''small scale'' but uniquely memorable crossover between Superman and... Wildstorm Comics, ''{{Thundercats}}''. As odd as that may sound. It was a one shot crossover called ''ComicBook/SupermanAndTheThundercats'' It involed a NoHoldsBarredBeatdown fight between Superman and Lion-O [[spoiler: and later Mumm-Ra]]. The one responsible for the whole mess being [[spoiler: [[RealityWarper Mxyzptlk]]... [[ExcusePlot naturaly]].]]

** This is followed by ''WorldWarHulk'', the follow-up to the ''Comicbook/IncredibleHulk'' storyline ''PlanetHulk'' where, days before ''Civil War'' happened, Iron Man and Mr. Fantastic shoot Hulk into outer space (because, frankly, the conflict was gonna have enough problems ''without'' having to deal with the Hulk). He ends up on a hellish gladiator planet, which soon explodes due to the ship Hulk was sent on blowing up. Needless to say, Hulk is pissed and fans get five issues of Hulk delivering karmic beatdowns towards Iron Man, Mr. Fantastic, and just about anyone else who gets in his way, as well as crossover issues in or with Comicbook/TheAvengers, GhostRider, [[LukeCageHeroForHire Heroes For Hire]], Comicbook/IronMan, AntMan, Comicbook/ThePunisher, and the XMen, not to mention a Prologue issue with a story that features the MiniMarvels filling in the background.

* ''EndWar'', now {{retcon}}ned [[CanonDiscontinuity out of canon]], is one of these for the Creator/TomClancy [[TheVerse game verse]], including former members of the [[GhostRecon Ghosts]] and [[VideoGame/RainbowSix Rainbow]], along with Third Echelon.

* The 2nd part of the ''TimeBokan'' OVA in 1993 involves the Dorombo Gang from ''Anime/{{Yatterman}}'' invading a city populated by other TatsunokoProduction characters, and who should show to stop them but the Anime/ScienceNinjaTeamGatchaman, Casshern, Hurricane Polymar, and Tekkaman?

* A made-for-TV animated movie called ''The Man Who Hated Laughter'' brought together a big group of ''newspaper'' comic strip characters -- Blondie, Popeye, Beetle Bailey, Hi & Lois, Snuffy Smith -- who are ultimately saved from a comics-hating villain by the combined forces of a group of newspaper adventure strip heroes (Mandrake, Flash Gordon, Prince Valiant, The Phantom, and Steve Canyon).

* Dozerfleet Comics' [[UltimateUniverse Comprehensive Gerosha]] timeline references the "Abolition" timeframe; where it's made clear that [[CiemWebcomicSeries Ciem]] shares a universe with [[EmotionEater Extirpon]], Navyrope, Pilltar, and the [[NathanielHawthorne Gray Champion]]. Doubles as a SuperRegistrationAct plot.

* The ''MarvelVsCapcom'' series is this for both Marvel and Capcom.
** The original ''MarvelVsCapcomClashOfTheSuperheroes'' reused the plot of the ''Onslaught'' saga and adding in Capcom characters.
** ''MarvelVsCapcom2'' has a more straightforward plot where Ruby Heart was gathering characters from both companies to deal with [[OmnicidalManiac Abyss]].
** ''MarvelVsCapcom3'' has [[VideoGame/ResidentEvil Wesker]] and DoctorDoom team up, crossing over the Marvel and Capcom universes, and awakening {{Galactus}} in the process.

* ''EndWar'', now {{retcon}}ned [[CanonDiscontinuity out of canon]], is one of these for the Creator/TomClancy [[TheVerse game verse]], including former members of the [[GhostRecon Ghosts]] and [[RainbowSix Rainbow]], along with Third Echelon.

** This is followed by ''WorldWarHulk'', the follow-up to the ''Comicbook/IncredibleHulk'' storyline ''PlanetHulk'' where, days before ''Civil War'' happened, Iron Man and Mr. Fantastic shoot Hulk into outer space (because, frankly, the conflict was gonna have enough problems ''without'' having to deal with the Hulk). He ends up on a hellish gladiator planet, which soon explodes due to the ship Hulk was sent on blowing up. Needless to say, Hulk is pissed and fans get five issues of Hulk delivering karmic beatdowns towards Iron Man, Mr. Fantastic, and just about anyone else who gets in his way.

* Bringing the tradition into video games, ''VideoGame/MortalKombatVsDCUniverse'' has a plot along these lines with {{Darkseid}} being somehow and involuntarily [[FusionDance merged]] ([[AmalgamUniverse for the]] [[JusticeLeagueUnlimited third time]]), now with Shao Kahn into an HumanoidAbomination who grinds the two universes into destruction just by ''existing''. Midway considers it an {{Elseworld}} for the DC side of the story, though they did write the ''Kombat'' side so as to implicitly fit in between ''VideoGame/MortalKombat3'' and ''VideoGame/MortalKombat4'' (as well as hand it a ContinuityNod in ''VideoGame/MortalKombat9'': the Training Mode description for Shang Tsung's M-rated CaptainErsatz version of SelfDemonstrating/TheJoker's gun fatality is "Shang Tsung has picked up a few tricks from previous opponents."). In real life, the crossover had the effect of WarnerBros., DC's parent company, being allowed to acquire Midway's ''Mortal Kombat'' division (now named Netherrealm Studios) when Midway went bankrupt.

* As part of Creator/ArtixEntertainment's 10th anniversary celebration, six of their active online games at the time (AdventureQuest, DragonFable, MechQuest, AdventureQuestWorlds, EpicDuel, and HeroSmash) [[KayFabe were attacked by]] [[CorruptCorporateExecutive Chairman Platinum and his company, EbilCorp]], sparking a cooperative war in which the playerbases of all six games had to band together as one and eliminate the invading forces in every single game within a week. [[spoiler: The players won.]]
** Prior to this, there was a St. Patrick's Day event [[YouMeanXmas (known in game as the Blarney War or Lucky War in-universe)]] that united the AdventureQuest, DragonFable, and MechQuest timelines [[DisasterDominoes in a successive war]], and a war against Shearhide that was a crossover between AdventureQuest and WarpForce.

* ''The Crossing'' ran through the Avengers books in 1995 as well. The premise was that Iron Man had been under the mental influence of Kang the Conqueror for years, and had now turned against the Avengers outright; the only way the Avengers could defeat him was to pluck a younger Tony Stark, untouched by Kang, from an alternate timeline, and in the end, "evil" Tony was killed off. This turn of events was [[DorkAge not well-received]], to say the least.

* ''VideoGame/ResidentEvil6'' is this for the ''Franchise/ResidentEvil'' franchise. Including [[VideoGame/ResidentEvil2 Leon]] [[VideoGame/ResidentEvil4 Kennedy]], [[VideoGame/ResidentEvil Chris]] [[VideoGame/ResidentEvilCodeVeronica Red]][[VideoGame/ResidentEvil5 field]], [[WildCard Ada Wong]], and even [[TheBusCameBack the]] [[SheIsAllGrownUp returned]] [[TookALevelInBadass Sherry]] [[VideoGame/ResidentEvil2 Birkin]] and [[BadassAbnormal a son of Albert Wesker]], all face off against a new, global bioterrorism threat, rather than confined to certain locations to chase down a singular threat.

* Though ''AstroCity'' is the only series in its continuity and thus incapable of crossovers, they still managed to play with this one. In "The Nearness of You", a man becomes increasingly obsessed about a woman who keeps appearing in his dreams. It turns out it's because a minor villain caused a TemporalParadox that threatened the universe and required all of the heroes to stop it -- and the woman is his wife who [[RetGone ceased to exist]] in the repaired timestream. Yes, the CrisisCrossover is relegated to a ''background reference.''

* The ''TabletopGame/OldWorldOfDarkness'' had a few thematic ones toward the end of its line, but an official one with the TimeOfJudgment series of books, officially ending the old settings.

* Webcomic/TheCrossoverlord is one between several superhero webcomics, including ''{{Webcomic/Lightbringer}}'', ''MechagicalGirlLisaANT'' , ''{{Mindmistress}}'', ''Webcomic/{{Dasien}}'' and Dead Debbie from ''Indefensible Positions''. The sequel, ''Webcomic/{{Crossoverkill}}'', retains {{Webcomic/Mindmistress}} and adds {{Webcomic/Energize}}, Yuuki from ''Sparkling Generation Valkyrie Yuuki'', [[EssayBeeComicsPresentsFusion Fusion]], Captain Perfect from ''BadGuyHigh'', MajesticKnight and ''[[Webcomic/MagellanHoodoo]]''.

* Webcomic/TheCrossoverlord is one between several superhero webcomics, including ''{{Webcomic/Lightbringer}}'', ''MechagicalGirlLisaANT'' , ''{{Mindmistress}}'', ''Webcomic/{{Dasien}}'' and Dead Debbie from ''Indefensible Positions''. The sequel, ''Webcomic/{{Crossoverkill}}'', retains {{Webcomic/Mindmistress}} and adds {{Webcomic/Energize}}, Yuuki from ''Sparkling Generation Valkyrie Yuuki'', [[EssayBeeComicsPresentsFusion Fusion]], Captain Perfect from ''BadGuyHigh'', MajesticKnight and [[Webcomic/Magellan Hoodoo]].

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