At the very least I'm hoping they upgrade Warscape or build an entirely new engine, because their current I feel simply cannot do a Total Warhammer, justice.
I lost track, but I believe the engine is due for upgrade or update anyway since it usually gets such a treatment every 2 or so releases(major+Expansion at least.)
Plus the fact that their current design can't even support Multiplatform multiplayer(OSX vs OSX, but no OSX vs Windows) is ridiculous IMO. Especially for a series that wants to push Multi-OS support. It's 2015, and they seriously need to get this act together.