Omni-Man (Nolan Grayson) originated in the Image Universe, created by writer Robert Kirkman and illustrator Cory Walker (with Ryan Ottley). The character is an expansion of a concept created by Alan Moore and Chris Sprouse. Omni-Man a member of the alien Viltrumite race and works as a superhero on Earth. Omni-Man appears in Supreme, Invincible, Noble Causes, and Dynamo 5. Omni-Man made his fighting game debut in Mortal Kombat 1 as a DLC guest character.