Well since VGchartz only has Japan numbers from Dark Cloud....(and I'm pretty sure they are wrong since I doubt the first game only sold 80k then the secnd one sold 200k more than that)
SO4 - will sell about 200k in Japan
WKC - will open with 200k in Japan
Dark Cloud 2 (Japan) - 260k
Rogue Galaxy (Japan) - 360k
WKC releases for christmas
SO4 releases in febuary. right in the middle of Demons Soul and Yakuza 3