I'm sure Halo Reach will be a great game. I don't think it will be much different from ODST, Bungie revamped the Halo engine for that game, and I have read in many articles Reach will be using that exact engine in ODST. Graphics and Gameplay will be the same, but levels and the game surroundings and multi player is what I think we will see the biggest improvement on. We can all speculate on this game but we will all just have to wait and see. Good Read though.