343i will not be adding 4 player co-op. the only changes they are making to the game are the graphics. if they had is four player co-op, they would have to add a warthog on the silent cartographer. and that would change the game. they are only remastering, not remaking. and for assassinations, the gameplay is running on the origianal engine. they would have to change the engine for that. i do agree that John could do with a graphic overhaul, but the rest is VERY unlikely to happen.