Halo-Kart would be beastly. There could be an O.D.S.T. that rides an H.E.V. and a Brute that runs instead of being in a vehicle.
Honestly though, I would like a Halo game (other than Halo 3: Recon where you pay as an O.D.S.T.) thats like Battlefront.
I now know why Ensemble Studios re-named themselves Robot Entertainment! They have no passion, no care, no GOOD creativity, no heart, and they only follow protocal. Have a nice day all you cold and heartless Robot Entertainment employees :)