well... it all depends when FFXIII comes out really. Just by looking at the current install base in japan now there isnt even 2 million users who own japan ps3's now. In addition, I seriously doubt that every person who owns a jap PS3 will buy FFXIII. Also, if you look at the million seller games for ps3 in the japan area there isnt one game close to selling a million in its current install base of less then 2 million. If FFXIII is released and there isnt a drastic change before or during its release then SSBB will definitely outsell FFXIII.