Steve Rogers vs. The World - AKA Steve = Scott Pilgrim and Tony = Ramona Flowers. Tony's got so many exes and so many ambiguous exes (Tiberius Stone, anyone?) that it would totally work. Except Steve's too sweet to really be like Scott, but eh. It'd still be hilarious.

Seriously, I would bake brownies for whoever managed to do this. (You might not want to eat said brownies, but still!) And if you do manage to pull this off, let me know!