Superman and Batman versus Aliens and Predator is a comic book co-published by DC Comics and Dark Horse Comics. It was written by Mark Schultz, with art by Ariel Olivetti. It is a crossover in which Superman and Batman have to battle both the Aliens and Predator. While both superheroes have had crossovers with the monsters individually, this was the first time they were with both at the same time. The two-part series was released on January 8 and then on February 14, 2007. Source: Wikipedia (en)