If a 40/40 from Famitsu is anything to go by, I'm going to assume it's at least decent. Plus I watched the IGN Wii Playground of the import copy and just by the laughter and swearing, I remembered why I love Smash. Not buying this is a foolish decision.
My Games of 2011:
The Legend of Zelda: Skyward Sword
Elder Scrolls V: Skyrim
Super Mario 3D Land
Uncharted 3: Drake's Deception