Superman: War of the SupermenSuperman: War of the Supermen.

Superman: War of the Supermen is an American comic book limited series from DC Comics that serves as the culmination to the Superman line-wide event New Krypton. The series began on Free Comic Book Day 2010, with a zero-issue released free of charge before the main limited series began the following week. The event was published throughout one month in May 2010.