Some photographs from the Killzone 3 press event last month have surfaced showing off posters of new concept art.  The first two pictures showcase the two Helghast leaders vying for control after Visari's death (the former a Helghan General and the latter the head of Stahl Arms), while the other pictures show off new enemy designs (in hazmat suits, etc.) and a new environment (probably the jungle environment, but possibly some form of caves of some sort).

Also, there's a new page up on Killzone.com dedicated to the W.A.S.P., including demonstration dootage:

http://www.killzone.com/kz/news.psml?kz_news_article=The W.A.S.P. Launcher, A Portable W.M.D.

Amazing concept art looks amazing.

btw, the helghast leaders look like Nazis....lol

Easily the best looking enemies in any game

First guy looks more like Stalin.

Please tell me that W.M.D. isn't in the online...

I'd say it'll be like the Electricity gun in KZ2...Powerful SP only weapon.

WASP looks beyond badass!

The really look nazis .-. But still awseome! :D

Is this Killzone 3 or another COD game based on WWII?

Wow I love the look of the explosions in that! Looks amazing