Briefly: Yes, that’s a real thing. Announced yesterday, IDW Publishing is doing a comic book crossover in October called Teenage Mutant Ninja Turtles/Ghostbusters. It’s a four issue run with the following description: “When a new invention goes haywire, the Turtles are sent to a whole new type of New York City. One with a whole lot more ghosts… and Ghostbusters! The two teams will have to learn to get along quickly, because a new foe from the Turtles past has followed them and aims to conquer NYC!” It’s written by Erik Burnham and Tom Waltz with art by Dan Schoening. [Comic Book Resources]