Worlds Unite is a twelve part story arc epic comic crossover between the Sonic the Hedgehog and Mega Man comic series published by Archie Comics, and the sequel to "Sonic & Mega Man: Worlds Collide". The story assembled characters from the largest amount of properties: as well as the main Sonic and Mega Man universes, the universes of their respective spin-off titles Sonic Boom and Mega Man X and later characters from numerous other Sega and Capcom properties, including Arthur, Firebrand, and Astaroth.
The crossover spanned across four comic book titles, including Sonic the Hedgehog, Sonic Universe, Mega Man and Sonic Boom, as well as a a prequel issue released for Free Comic Book Day and two one-shot issues. It began on 27 May 2015.