I think everyone's forgetting one thing about NSMBWii

[Galaki]

Yes, many games that have 4 players that makes you want to actually buy 4 wiimotes but how many of them that makes you feel like you __need__ them?

Brawl is indeed one of them but Brawl doesn't have the selling power that NSMBWii does. Hence, the wiimote sales for NSMBWii will be greater than Brawl.