Goku vs Superman Vegeta vs Batman Piccolo vs John (i think thats his name: The green guy on Justice League) Android 18 vs Wonder Woman Tien vs Flash Gohan vs Green Lantern Trunks vs The girl w/ the wings (On Justice League)!!!!!
I think that DBZ should make a crossover game w/ DC 4real
DBZ Universe = Characters who can easily warp reality and destroy entire solar systems with one hand as well as move at the speed of light inside an atmosphere.
DC Universe = Characters who, at most, can lift a city or two and move at around mach 16.
The fights wouldn't makes sense in terms of power. Also, every character (worth playing as) in DBZ can fly at super speeds while there are many DC characters that are incapable of flight.
In short, DBZ characters would get SEVERELY nerfed and DC characters would receive a huge strength upgrade to balance it out. Maybe they could make the gameplay fun, but none of the characters on either side would be true to their show/comic/movie counterparts. Might as well pick a different franchise to merge.