mmmm....maybe have a planet and each team have their own island or somthing...
each member owns part of the island and can design a background for the island. if somone attacks you they have to choose which part to attack and use its background/arena to fight in... and u can make a map for the islands of the arenas... and if you lose the other team can claim that part of your island....
i dont know if i even made sense but oh well
