The Injustice comic series, hitting shops and digital stores today spells out why Superman is fighting Batman (as they do from time to time) in Injustice: Gods Among Us, the fighting video game.

But if you're not picking that up, or just need the cliff notes, this trailer above fills you in on a very different vision of the future, in which Batman is cooperating with Harley Quinn and, evidently, Deathstroke, and fighting Green Lantern.

Injustice: Gods Among Us will release April 19 on PlayStation 3 and Xbox 360.