Argh, cuss not at Blizzard! One of the few true game developers AND publishers. They merged with Activision, but they retained all their development and publishing rights, afaik. (they disclosed part of the contract in NextGen).
I've never played the tabletop game, im far too poor to buy my army, and the entire painting kit(wait, there IS no w40k where i live) but I sincerely hope they put the DaemonHunters or the Witch Hunters in.
The sisters of battle were okay, but they should have placed the witch hunters(my fav faction) properly, with an Inquisitor hero(I mean a REAL inquisitor, the kind that can recruit ANY space marine chapter except Grey Knights or the Adeptus Arbites).
Stuff I'd love to see in the game:
-A close resemblance to the tabletop game
-Either in-depth hero customization(from name to looks and powers) or some sweet HQ options such as in the tabletop game.
-A true Imperial Guard faction. Endless hordes of imperial guardsmen. In the codex illustrations, they match even tyranid numbers