Official Crysis Warhead website recently posted some new in-game screenshots. Crysis Warhead is a completely new game, and although some call it Crysis 2 it's actually not a sequel to this game.
The game goes parallel to original Crysis plot, but this time you'll be playing as sergeant Sykes, a.k.a. Psycho.
The game is developed on an optimised and improved version of CryENGINE 2, and besides the solo campaigns there's also some new multiplayer goodies.
Crysis Warhead is sheduled for PC this fall so to make the wait shorter and less painful, you can check out the rest of the screenshots here.