Wii Play Plus with online as said above
Wii Relax (I think this one will be marketed alongside Wii Fit as being part of the whole health thingy)
SMG2 - no chance, it will stall at 6~7M
The Last Story - the game that is rumored to use the vitality sensor, if it is a nice hit and unique software
Nothing else in my opinion there's no kirby, starfox, metroid, etc that can go that higher in sales.