Released/announced Games I think will outsell SSBB this gen:
Wii
Wii Sports
Wii Fit
Wii Play
Xbox 360
none I can think of
PS3
none I can think of
PSP
none I can think of
PC
Starcraft 2
Sims 3 (though it's multiplat)
Spore
Multiplatform
GTA IV
Call of Duty 4
DS
Nintendogs
Pokemon Diamond/Pearl
Brain Training
New Super Mario Bros.
Mario Kart DS