JLA: Salvation Run (New Edition)

A distant prison planet. Forty metahuman psychopaths. Some believed that exiling these villains – the Flash's Rogues, Metallo, Vandal Savage, Killer Croc, and the rest of the worst – would curb the recent violence on Earth.

But Luthor seeks escape. And even as Joker's followers embrace the primal brutality of this alien land, the war these two madmen ignite between their camps – murder, betrayal, ape-on-ape violence – is even less terrifying than what suddenly appears in the sky.