That would be cool too, but he'd never play Gambit. He doesn't want to be typecast, and playing Gambit (while a fanboy/girl dream) would just turn him into the southern hunk Michael Cera of the movie industry.
Seriously, what the fuck is up with Michael Cera being in 2 movies every year? It's always the same fucking role. The new movie looks eh, but I doubt he'd be funny enough for a 10 dollar movie ticket.