NicholasCage on 22 February 2009
GG already confirmed they are developing Killzone 3, but right now they are concentrating on Killzone: Liberation 2 for PSP. They said Liberation 2 WILL come out in 2010.
I would say KZ3 will come out in 2012 or for PS4 launch date [If PS4 comes out in 2012-2014.]