Killzone 3 powered by Uncharted 2 graphics engine
First of all, easy on the big font.
Second, that's not at all what the article said. All it said was that a few of the Naughty Dog guys helped out on the engine. Which should be 0% surprising, since Sony first parties have been sharing tech this entire generation.
I think the snow part is where ND comes in.
Also, they did mention the game will feature"total destruction". Basically more or less like BFBC2.