i was abt to say taht even GC did above 100k before, i saw ioi already did. Really now, the Wii's decline in Japan started about spetember last year, much earlier than the west. That was due to a very weak lineup, especially in Japan were it's essential to see constant releases. The Wii had only AC, Taiko, and Wii music that were regarded as big hits(Wii music didnt even manage 500k).
Whereas this year SW3, NSMB, Super robot taisen, tales, FFCC, WF+ coupled with taiko, WSR effect, and a couple of 100-200k hits(hudson and naruto). SW3 and Tales i predict will be huge for Wii, and NSMB will eclipse AC definitely, whats more to compare?