[[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 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... until the "Rage of Ultron". 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, to the extent that Brian Michael Bendis said that the story takes place in Earth-616 in order to make what happens in the Age of Ultron itself more important. It doesn't work, owing to the very way time travel relates to alternate universes in Marvel. In the end, two separate {{Alternate Universe}}s are treated this way: [[spoiler:the Age of Ultron itself (Earth-61112) and the attempt by Wolverine to fix it resulting in the loss of TheMagicVersusTechnologyWar (Earth-26111)]].
* FantasticAesop: The moral of the story; '''do''' '''''not''''' ''' mess around with time.'''
-->'''Tony Stark of Earth-26111:''' Listen to me, the reason... the reason why we don't go back and forth through time and fix things... The reason we don't just do whatever we want whenever things don't go our way is because we can't. Time is an organism. It's part of us. [[RealityWarpingIsNotAToy It lives and breathes and every time you travel through it, you rip it. You tear it. You hurt it.]] If you keep doing it eventually you will ''kill'' it. You'll break it beyond repair. Do you hear me? [[TimeCrash What happens when time is dead? What happens when you kill it?]]
* 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.
* GoodScarsEvilScars: Black Widow's got a severe burn on the left side of her face.
* 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.
* TheMagicVersusTechnologyWar: [[spoiler:the [[ComicBook/TheMightyThor Asgardian]]/[[SelfDemonstrating/DoctorDoom Latverian]] War in Earth-26111, which happened on account of [[ForWantOfANail Earth-61112's Wolverine]] [[NiceJobBreakingItHero killing Hank Pym before he created Ultron]], resulting in the dissolution of the Avengers and the victory of said war by the combined forces of Doctor Doom and Morgan le Fay (here called Morgana le Fay) and their magic, only barely held in check by a veritable army of ComicBook/IronMan drones by the time of the present day.]]
* MindScrew: The entire ending. [[spoiler:Time and space are shattered and repaired thanks to Wolverine and Sue's time travel mishaps and it brings [[ComicBook/AngelaMarvelComics Angela]] out of the ''ComicBook/{{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 [[TheMagicVersusTechnologyWar 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 throughout the storyline regarding the attempts to SetRightWhatOnceWentWrong 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:[[ComicBook/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, though she received an explanation [[ComicBook/OriginalSin later]] that excluded her from her source.]]
* 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.
* WreckedWeapon: Captain Amercia's shield has been broken ''again''.