Marvel=DC
Since the X-men and the F4s greatest power is team work I'm gonna make it 2 on 1 for most of them.
Rogue (classic), Storm & Human Torch vs Wonder Woman
Bishop & Gambit vs Batman
Nightcrawler & Invisible Woman vs Flash
Professor X & Mr. Fantastic vs Martian Manhunter & Plastic Man
Colossus & Beast vs Aquaman
Wolverine, Havoc, Cyclops, Thing & Emma Frost vs Superman
Rogue (classic), Storm & Human Torch vs Wonder Woman
Bishop & Gambit vs Batman
Nightcrawler & Invisible Woman vs Flash
Professor X & Mr. Fantastic vs Martian Manhunter & Plastic Man
Colossus & Beast vs Aquaman
Wolverine, Havoc, Cyclops, Thing & Emma Frost vs Superman