Being pressed on Killzone 3 by host Geoff Keighley, Tretton responded:
[quote]
“Well we own Guerrilla studios and they did a great job on Killzone 1 and 2, I don’t know whether you’ll see announcements about it [at E3 2010], but I can promise you we’ll see a Killzone 3.”</blockquote>

Worry not then Killzone fans - it's coming. Tretton confirmed Sony plan to bring a "lot" to E3, so there's plenty to be excited about.

You can check out the full interview through here.