I'd love to see World at War 2 or something. A COD game from a real era and not some dumbed-down fantasty title aimed at the younger gamer. Call of Duty used to be a serious shooter back in the day and I hope that Treyarch can take it back to its roots. WAW had the best maps in the series, best design, no quickscope nonsense or petty politics like we get today. It was a solid MP game; not overly-spectacular with ludicrous killstreaks but the core gameplay was memorable and enjoyable.