>>718289613
Like I can even think of a premise right now.
>Mongul summons a group of Superman villains to Warworld. Each is given a small section of the planet and they're forced to compete for the warlord's bread and circus act. Each section is bared off with a super science barrier and each time Superman beats a villain he frees more of the planet.
You can even have some bullshit were Metropolis gets zapped and works as Supermans zone. Toss in robots, aliens and powerful minions and you got a game.