What would be nice is if they ported the Killer Instinct stand alone emulator that they had out for PC about 15 years ago. That emu only played KI 1 and 2, but played them perfectly at full speed. Those are two of my favorite games of all time so would be nice to get those on the pi. Hardware wise they would run fine if they ported that, they ported a version to the hacked original Xbox 1 and it ran fine on there, specially KI 1, 2 had a little bit of slow down but Pi 2s hardware is vastly more powerful than original xbox how ever.