For those who have not seen this

Warhammer 40k Space Marine Game

Relic Entertainment are at again!! They have revealed a new console game for the Xbox 360 and Playstation 3. The game is known as Warhammer 40,000: Space Marine and will focus on the iconic Space Marine with player taking control of a superhuman Marine and battling through the Warhammer 40,000 universe.

THQ Australia leaked a scrapped Warhammer 40,000 game last year, this will be different and the game will be built from ground up, being a hack and slash version of Dawn Of War! “Relic has a deep understanding of the license based on our previous projects with Games Workshop,” said Jonathan Dowdeswell, GM of Relic. “Our goal is to ensure Space Marine delivers the most intimate and brutal Warhammer 40,000 experience to date.”

While no specific details were confirmed, Relic did say mention that a major focus of the game would be multiplayer. http://www.relic.com/news

As an addendum to this, I found this totally kick ass trailer on YouTube too!
http://www.youtube.com/watch?v=GnrNKUsW7M4&feature=player_embedded