As much as I like Warhammer 40K (used to own some spacewolf table top units myself too, they are the badass of the Space Marines) I have a hatred against MMO's. So this doesn't raise my interest at all...nice trailer but it doesn't pull me towards buying it or even having interest in it.
a bit oftopic, this however has me interest:
http://en.wikipedia.org/wiki/Warhamm...:_Space_Marine
now I do hope you're allowed to customize what army of space marines you are
HunterICX