The stories depicted in the miniseries about each domain's characters' powers and personal histories vastly differ from the ones portrayed in the main Marvel universe(s). For example, there is a Tony Stark present in many of the territories where the Kingdom of Manhattan has both the Earth-1610 and the Earth-616 versions, and many versions of Thor serve as a peace-keeping force.

Various versions of individual Marvel characters can be present multiple times on the Battleworld. The planet itself is divided in many territories that are mostly self-contained and where a 'pocket universe' composed of a specific storyline or universe reside and evolve. The storyline involves the destruction of the Marvel Universe and various other alternate universes (including those seen in the Ultimate Marvel and Marvel 2099 imprints, the ' Age of Apocalypse' storyline, the Marvel 1602 universe, and the ' House of M' storyline), with each universe's respective Earth combining with each other into Battleworld, a planet that exhibits the aspects of the various universes. The event also served as a conclusion to the Fantastic Four (which Hickman had written from 2009 through 2012) after Marvel decided to cancel the title due to a film rights dispute with 20th Century Fox and declining sales. Released on May 6, 2015, the storyline includes a core Secret Wars miniseries, written by Jonathan Hickman and drawn by Esad Ribić, which picks up from where the 'Time Runs Out' storyline running in The Avengers and New Avengers ended. It recalls the 1984–1985 miniseries of the same name.

' Secret Wars' is a 2015–16 comic book storyline published by Marvel Comics.

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