Square Enix: Final Fantasy 13 needs 10 times the success of average titles.

[Rei]

The initial shipment in Japan should be 2 millions. Overall I expect the original version to sell 7 millions worldwide.

If I am not mistaken they said at last years GDC that they have about 400 people working on the game. EDGE says there are about 200 people working on just cutscenes.