Everyone should watch the Waypoint exclusive on the remake.
Halo1 Pistol: Confirmed
Original Gameplay: Confirmed
XBL Co-Op: Confirmed
Multiplayer: (iffy about this one. is the campaign an odst like expansion or is it an entirely different game just using the reach engine? if so, is the multiplayer reach or is it halo1 with updated graphics?)
3 out of 4 is pretty good. Of course Multiplayer is the big thing about this, but if you can at will change backt to the original assets on the fly and use the Halo1 Pistol, I'm pretty much sure they kept to the basics with the multiplayer.
CANT WAIT HNGGGGGGGHHHHHH
Also, in the halo4 trailer. Cortana's ass.