Marvel Comics announced the storyline in June 2010, with editor Jordan White saying that the Chaos King, "the living embodiment of the void before time and space began, has decided he liked things better before everything was" and is "on a mission to wipe out all of existence [by using] an army of alien space gods...." The primary opposition is the Greek god superhero Hercules leading the God Squad, an informal alliance of heroic characters. The Chaos King is in actuality Amatsu-Mikaboshi, a demonic god of evil.
The storyline began in Chaos War #1, the first issue of a core miniseries scheduled to run five issues (cover dates early Dec. 2010 - March 2011). It is written by Greg Pak and Fred Van Lente, with art by penciler
Khoi Pham and inker Tom Palmer.
In addition, the story continues through the one-shot Chaos War: Alpha Flight #1 (Jan. 2011), by writer Jim McCann and penciler Reilly Brown, starring the titular Canadian superhero team; Chaos War: Chaos King #1 (Jan. 2011), by writer
Brandon Montclare and artist Mike Kaluta; Chaos War: Dead Avengers #1-3 (Jan.-March 2011), by Van Lente and penciler Tom Grummett, featuring deceased and resurrected members of the superhero team the Avengers; Chaos War: Thor #1-2 (Jan.-Feb. 2011), by writer J. M. DeMatteis and penciler Brian Ching, starring the Norse god superhero; Chaos War: Ares, by writer Michael Avon Oeming and co-pencilers
Stephen Segovia, starring the Greek god antihero Ares; Chaos War: God Squad #1 (Feb. 2011), by writer Marc Sumerak and penciler
Daniel Panosia; Chaos War: X-Men #1-2 (Feb.-March 2011), by writers Chris Claremont and Louise Simonson and artist Doug Braithwaite, featuring the titular mutant superheroes; and the biweekly Incredible Hulks #618-620 (early and mid Feb. 2011), by Pak and Paul Pelletier.