FF13 will be the most noticeable spike with Japan. Such a large title the PS3 could easily sell anywhere from 100k to 250k in that one week. But after that it would be about where it levels out at. Same with Versus but on a smaller scale.
God of War 3 will give it a spike but something more like KZ2 if I had to guess but a little bit larger. Gran Turismo 5, though is the one that really could help it all around the world. Easily one of the largest mainstream properties in gaming, could start getting some of those casual gamers that were on PS2 and PS1 to invest back into a PS3. Not to mention if they tied a price drop with this or a really good bundle, it could really do some damage.
Any other games like Uncharted 2, infamous, etc will probably just give spikes or a GTA IV effect, which was nothing. But until then its GT5 and FF13/Versus are the only ones I think could have long lasting effects and with FF13 only in Japan.
