From Terminal Gamer:
Halo: Reach to Channel Combat Evolved, Ratchet Up Tension To Create a Definitive Experience
Halo: Reach is going to be a definitive experience for the Halo series and for the Xbox 360. Advances to the Halo 3 engine are going to push the Xbox 360 to its limits and will allow for much larger on-screen battles, a greater area to explore in each mission and will allow for a uniquely crafted world to take shape. The developers at Bungie are looking to create an experience that capitalizes on the loss and shock of the Reach attack. It will be a dark game fraught with desperate situations and small victories, and it will be an experience that pulls together the best aspects of this classic shooter series.