Or they could go really crazy and bring back the Stumps (the dwarf race, they died in the 90's). And while I'm dreaming I would like a million bucks. My biggest problem is that they would just be bringing an army tha'st just a Space Marine spin off. Realistically I think that they should bring in the Demons of Chaos, which to date have seen no action. Since that army is based of four different gods, you could have a verity of play styles. My idea would be to have 4 differnt versions of each unit, and then you could customise which one you wanted before the battle. This would be a compromise: Slaanesh for people who want really fast, really agressive units (Dark Eldar), Tzeentch for people that would like shoot stuff to bits (Tau, IG), Nurgle for those who like having a horde that just won't die (Necrons), and Khrone for those of us that like to see demons killing everything in sight with huge axes (just about everyone). But the only way for balancing not to be a pain is to make you stick with one god for the entire tech tree. Another problem is that the demons can teleport to any part of the battle field right from the start. They could just get rid of that.