Rumor Reporter was just given a lengthy list of upcoming games for the Wii, PS3, 360, PSP, and DS at a corporate meeting for a major rental chain. This list is certainly something to look at, especially since not all of these games have been announced.
PS3: Metal Gear Solid 4 11/1/07
Xbox 360: Halo Wars 11/1/07
Wii: Big Brain Academy 6/28/07