Bikes in Gears of War 2?

And in LocoRoco 2, Metroid Prime 4 and Street Fighter IV... sort of

Metroid Prime
Samus is already wearing a crash helmet (ish) so adding a bike to the game doesn't look that out of place.

Rez
Alternatively, how about a sequel for Rez? You could even call it 'Revs'. See what we did there?