Apparently you can, I read on the forums about some sort of chapter multiplayer skin. BA, SW, IF etc.
Next game to buy: September 6th, space marine. If it gets ok reviews.
Read an OXM mag with a preview, said it was pretty good. Apparently you revive your health with a series of brutal take downs, switching from ranged to combat happens quickly and there is a mix of orks and CSMs to beat to shite with a damn few weapons, including a thunder hammer! Apparently one downside was that the interior of the FW is a bit barren, they preferred to have more enemies in your face than graphical extras, but it does have it's moments. So make of that what you will, but it should be a good game provided they make a suitable storyline out of it all.
And that there is a powerfist.
And that the multiplayer is actually good, like War for Cybertron good.