[[caption-width-right:250: [[ComicBook/AgeOfApocalypse Apocalypse]] who?]]

'''Age of Ultron''' (abbreviated AU) is a MarvelNOW CrisisCrossover storyline written by Creator/BrianMichaelBendis and featuring ComicBook/TheAvengers published by Marvel Comics, that involves the return of ComicBook/{{Ultron}} and his conquest of the Earth.

Suddenly and without warning, a RobotWar of epic proportions was kicked off as Ultron made his grand attack on Earth, taking over the planet as a lifeless, mechanical world and forcing many of Earth's heroes -- those that survived the initial assaults -- into hiding. As Earth's heroes prepare to make a final assault, two heroes -- Wolverine and the Invisible Woman -- decide to take matters into their own hands and confront Ultron's creator, Hank Pym, before he could make the robot. However, are the consequences of these actions worth our survival?

The storyline had an odd concept with its tie-in issues. A number of titles, including ''Uncanny Avengers'', ''ComicBook/FantasticFour'', and ''ComicBook/SuperiorSpiderMan'', released a second numbered issue alongside the regular issue for that month, this one bearing an "AU" mark beside the number. Originally, they were meant to be one-shots, but were changed at the last minute.

A sequel dubbed ''[[Comicbook/CataclysmTheUltimatesLastStand Cataclysm: The Ultimates Last Stand]]'' was be launched in late 2013. The series sees the heroes of the [[UltimateMarvel Ultimate]] universe dealing with [[spoiler: {{Galactus}} after he is teleported to their world thanks to Wolverine and Sue Storm's actions]].

Not to be confused with the 2015 Franchise/MarvelCinematicUniverse movie ''[[Film/TheAvengersAgeOfUltron The Avengers: Age of Ultron]]'', which borrows the name of the crossover, [[InNameOnly but is not an adaptation]].
!!''Age of Ultron'' provides examples of:
* AlternateUniverse: [[spoiler:Two, aside from the prime Earth-616. We have Earth-61112, where TheBadGuyWins, and Earth-26111, where [[ForWantOfANail without Ultron and Hank Pym]], MagicVersusScience was decided completely in favor of magic.]]
* AmbiguousTimePeriod: It's never stated exactly how long it's been since Ultron took over.
* AnyoneCanDie: [[spoiler:Ultron finally dies... [[JokerImmunity for now]]. The others are double subverted, as they do die, but in alternate universes that don't make a huge difference in the grand scheme of things.]]
* AIIsACrapshoot: Ultron takes over the world.
* CloseEnoughTimeline: The timeline generated at the end of the story. It's basically the same, but with a small detail that leads to a happy ending.
* CrisisCrossover
* ExpendableAlternateUniverse: ''Desperately'' tries to avert this. It doesn't work.
* FantasticAesop: The moral of the story; '''do''' '''''not''''' ''' mess around with time.'''
* ForWantOfANail: Going back in time and taking out [[spoiler:Henry Pym]] of all people leads to a very different world.
* GenreSavvy: Nick Fury knew that the Avengers would come to his base at the Savage Land, and was waiting for them... even when they didn't know about the very existence of that base, and Fury did not arrange anything to let them know.
* GreatOffscreenWar: The opening of the series takes place a month or so after Ultron's conquest of Earth, with many of Marvel's heaviest hitters (including {{Thor}}, {{Magneto}} and the {{Hulk}}) already dead.
* HeroicBSOD: What Captain America has apparently been doing since Ultron took over.
* LawOfChromaticSuperiority: The Ultron model that finally succeeds in conquering the world is gold, rather than the usual silver or battleship grey.
* MindScrew: The entire ending. [[spoiler:Time and space are shattered and repaired thanks to Wolverine and Sue's time travel mishaps and it brings Angela out of the Spawn Universe while seemingly pushing Galactus into the Ultimate Marvel Universe.]]
* TheMole: When She-Hulk tries to meet Ultron, she meets his servant instead: [[spoiler:The Vision]]
* MurderIsTheBestSolution: [[spoiler:Subverted. Wolverine thinks that the best way to save reality from Ultron is to kill Hank Pym before he created it. However, this leads to [[MagicVersusScience magic winning over science]], and Tony Stark in the new world chews him out for not just suggesting a way to kill Ultron being in-built. The resulting time travel causes untold destruction to TheMultiverse.]]
* NothingIsTheSameAnymore: Ultron returned and is ruling over a dystopian world. [[spoiler:The conclusion causes a multiversal MindScrew that sends various universal versions across dimensions, including {{Galactus}} to UltimateMarvel and [[ComicBook/{{Spawn}} Angela]] to the prime MarvelUniverse.]]
* NiceJobBreakingItHero: [[spoiler:Wolverine's jumps through time open a tear in the fabric of space and time, creating a RealityBreakingParadox.]]
* ShownTheirWork: After [[spoiler:Wolverine killed Hank Pym before he could create Ultron]], Bendis released [[http://brianmichaelbendis.tumblr.com/post/49489930167/so-would-you-consider-sharing-those-ideas-as-to-how a list that compiled of all of the changes that would come as a result of this]] - Whilst some are fairly obvious ([[spoiler:Ultron, Vision or Victor Mancha never being created]]), some were less so ([[spoiler:[[TheThanosImperative Nova & Star-Lord not sacrficing themselves to stop Thanos]]]]) or just obscure ([[spoiler:The events of ''ComicBook/{{Nextwave}}'' never took place]]).
* TerminatorTwosome: Wolverine goes back in time, to kill Henry Pym before he creates Ultron. Sue Storm follows him, to try to convince him not to do that. [[spoiler:Eventually, it is Wolverine who convinces her, who stands sad and does nothing while Wolverine does what he does best.]]
* TimeSkip: What the GreatOffscreenWar takes place in.
* TimeyWimeyBall: Ends with a [[spoiler:fairly small RealityBreakingParadox.]]
* WhamEpisode: [[spoiler:Galactus of the main Marvel universe[=/=]Universe 616 is now in the Ultimate universe. Angela of the Spawn Universe is now in Earth-616.]]
* WhatHappenedToTheMouse: in the lead up, the Bendis written ''MoonKnight'' title's main plotline concerned the deactivated head of an Ultron, and the final issue stated that this would tie in to ''Age of Ultron''. It was never mentioned again.
* WolverinePublicity: Wolverine seems to be doing a lot more in this story than anyone besides the Invisible Woman, to the point that there are two Wolverines at one point.