NSMBW is going to be MASSIVE in Japan. Preorders rank higher than NSMB DS.

[kopstudent89]

Here's a link: http://en.wikipedia.org/wiki/New_Super_Mario_Bros.
Sry couldnt find other than Wiki, but it says 480000 first day, week one over 900000. Expect NSMB Wii to follow similarly ( ie first week sales double first day sales)