It also needs 3 or 4 player co-op imho to make it a stand out game. I doubt they will have the time or disc space to do that and improve the multiplayer.
I agree with that. I am hoping they will improve on MP and fix the glitches, but I cant see it being anything special or significant. I will still buy it though since I enjoyed the first one in Co-op even if it was short and the story was full of plot holes.