Gran Turismo 5 - 6 million: considering original motorstorm did more than 3 million with smaller user base.
Killzone 2 - 1-3.5 million: if it delivers, then 3.5 million, but if it was any thing like the first, maybe 1 million.
Heavy Rain - very hard to say: i would guess about 1 million.
Infamous - 750k
White Knight Chronicles - 500k
Team ICO's next game - 1 million
God Of War III - 2.5 million
Uncharted 2 - 2.5 million