Batman's worst enemies - the Joker, Harley Quinn, and more - have escaped Arkham Asylum. But where have they all gone? The World's Greatest Detective tracks the super-villains to New York City - home of the Teenage Mutant Ninja Turtles! BATMAN and the TEENAGE MUTANT NINJA TURTLES team up in this one-of-a-kind comic series. Along with high-impact art, these fast-paced stories are sure to leave fanboys and fangirls alike SHELL SHOCKED!