Killzone wont bomb... But if you think 1 game will turn it all around you are getting your hopes too high.
that said GT5 really has the best chance of giving the PS3 a crapload of mo.
End of 2009 Predictions (Set, January 1st 2009)
Wii- 72 million 3rd Year Peak, better slate of releases
360- 37 million Should trend down slightly after 3rd year peak
PS3- 29 million Sales should pick up next year, 3rd year peak and price cut