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Age of Ultron was a Marvel Comics storyline that was written by Brian Michael Bendis in 2013. The storyline involved the Avengers battling Ultron, a sentient robot created by Hank Pym, in the future. The storyline was met with mixed reviews, with some critics praising the story's scope and ambition, while others criticized it for being too convoluted and for not living up to the hype.