For all you guys talking about Soul Sacrifice:
Currently, the COMG top 20 is made up entirely of games which are either sequels or part of pre-existing IP's; or part of popular anime series. Seriously, every single one.
Soul Sacrifice won't open big. It's a new IP. Japan are usually quite slow on new IP's. Usually. It took Monster Hunter 3 games on PSP to really hit the massive sales.
Best we can hope for in SS' case is that it gets good reviews, good word of mouth, and has decent legs for a while.