The Image Universe (IU) is a fictional universe in which some of the stories published by Image Comics take place. It was introduced in the early years of the publisher, shared by the various creators who formed the Image partnership. The independent, creator-owned nature of their work led to limited interaction between their characters, and little coordination of the Image Universe as a shared setting, with the primary versions populated by a number of superheroes/villains, including Supreme, Invincible, Omni-Man, Spawn, Angela, Atom Eve, the Savage Dragon, Gert, Bomb Queen, and Witchblade, as well as incarnations of the Teenage Mutant Ninja Turtles.