Microsoft already has AAA shooter exclusives coming out of their ears. I don't think there will be much to fear from Killzone 2 because its coming so late in the scene and there are so many awesome shooters due 2009 (COD MW 2 & Halo ODST + Unannounced likely) and so many awesome shooters released in the past.
Between COD, Gears, Halo and other games like L4D is there a significant margin of people without consoles who are also shooter fans? I doubt it.
Killzone 2 is an awesome game no-doubt, but its coming to a genre that Microsoft pretty much has wrapped up in their sweaty little hands so it can't change the tide significantly.
Tease.








