343 industries confirmed that halo 4 is going to be a 360 game. Porting it to next xbox would be pretty pointless as it would be the same exact thing as the 360 game. Anyway I don't think a new xbox is coming out at the end of 2012. Just for the 2012 holidays halo 4, call of duty, and assassins creed III are already confirmed 360 titles. Its possible that Grand Theft Auto V, Diablo 3, and a new bad company game will also be holiday 360 titles. Releasing the new xbox with huge games like those still releasing for the 360 doesn't really make sense.
The wii U will only encourge developers to make more 360/ps3/wiiu games since it is in a similar class to them. The new xbox would get outsold by the 360 holidays 2012 since it won't get any third party support. Developers will either make a game for the wii U, PC, and the 360 and PS3 which will still be selling well, or make a game for the new xbox with a none existant install base and the very top of the line PCs. What do you think they will pick.
