Batman (Michael Keaton)
The Punisher (Dolph Lundgren)
The Shadow (Alec Baldwin)
The Phantom (Billy Zane)
Zorro (Antonio Banderas)
...all do battle to see who comes out on top. Everyone gets standard gear (at least what they had in their movie's final battle), no vehicles, standard rules apply.
Their battlefield is, I dunno, midnight at Jurassic Park without the dinosaurs, but the jungle, visitor's center, etc. are all fair game. Everyone starts at equidistant edges of the island.