As I watch all new videos, trailers, and hear rumors flowing around, I think what I want from Halo 4.
I would want to see new vehicles, aircraft and ground alike, bigger game modes, possibly going as large as 24 or more. An easier way for moving large squads of teammates throughout the map. I always saw, most particularly in Reach and Halo 3, as a team movement, but never as powerful.
I want to fly into battle dropping off, or be dropped off right into the fight.
Express your option and how you, the player want it to be.