Bad reasons.
1. MS if anything should launch at the same time as Nintendo and outspend them on advertising to convince them that Kinect 2.0 > Nintendos tablet. Can't give Nintendo breathing room to convince the public their route is better.
2. Pulling a Twilight Princess with Halo 4 won't hurt the 360 at all. Only the core, early adopters will buy launch consoles.....the vast majority will do a wait and see approach. Your gonna get millions buying the 360 version and more early adopters with the next Xbox.








