So how about it? Play through as a team of heroes or villains, then unite in the second to last chapter to face a common enemy. Let's say Galactus, to continue where UA 1 left off... Heroes 1. Captain America 2. Spiderman 3. Ironman 4. Punisher 5. Scarlet Witch 6.
Deadpool 7. Hercules 8. Thor 9. Silver Surfer(Unlockable) 10. Scarlet Witch(unlockable) 11. Machine Man(unlockable) 12. Gladiator(...