He didn't act cocky as he usually does (a good thing...)

I agree with releasing Sima on the PS3 - more players will experience what is better than God of War/DMC/Shinobi/etc. As much as I enjoyed GOW, NG didn't have that button mashing mini game crap that really made the game longer than it should have been (those climbing parts in Hades was annoying also.) NG tested your skills and had real strategies, not just mashing the buttons.
I believe Sigma will be released on the 360 right before NG2. Why? With Gears of War, RB6: Vegas, SC: Double Agent and Halo dropping, I doubt the PS3 will have that many buyers. So they will make a port to the 360.
As hot as Sigma looks, NG2 will look better.