DonWii on 16 May 2007
I consider Wii Sports a game, though I see it more as a demo. It really shows what the Wii can do with sport related games. As for the question at hand, definately World Wide best seller will be Pokemon Diamond/Pearl. US sales will be close between GTA IV and Halo 3, though I expect GTA IV FTW. In Japan, it will surely be... does it matter. It is going to be a Nintendo game anyway.
