Which PS3 title will be the next to break 5 milllion?

[RPG]

Not many, the PS3 does not have many big sellers.

GT5 is the only certainty of the games announced. I fully expect FFXIII to sell 2 million in Japan however do not think NA and EU will do 3 million between each other. So yeah just GT5. :/

Edit - Modern Warfare 2 will do it as well with ease.