I really doubt Wii Sports Resort will be as big as Mario Kart/Wii Fit, but I could be wrong.
PS: I checked a bit, and couldn't find any other mutliplat games that threaten MKWii.
I was wrong on one thing though.
GTA IV will > Wii Fit for first 52 weeks. It will also beat GTA:SA
Current sales: 11.74M, and it still has several weeks left.
http://www.vgchartz.com/games/userreviewdisp.php?id=261
That is VGChartz LONGEST review. And it's NOT Cute Kitten DS







