To me one thing that really epitomises the grimdark is the strange and varied citizens of the imperium, and the one place to go for that would be the inquisition and its warbands. There have been alot of excellent models removed over the last few years.
I really think that the inquisition could be great for the tabletop and it really needs a major overhaul to do that. I know others need it as well but they really need a full rework to become a force in their own right.
How could they possibly do an amazing plastic warband though? What sort of sets would you like to see if they really went whole hog with them? Andv is it even viable