

Batman/Constantine/Lex Luthor vs Mr Fantastic/Hank Pym/Dr Doom
Both teams have a year of prep time. Both team have their full arsenal at their disposal. Lex & Doom can use their minions.
Both can bring 3 other wild card characters into their teams. Interdimentional travel and time travel is allowed - - any character goes, but they gotta be convinced first.
Objective is to eliminate the other team and WIN THE WAR, whatever the cost.