Maybe the game is build around managing your Battle tower. You rule there, you hire henchmen, send them on quests, create items and creatures, build defense, help to rebuild nearby town and defend both your tower and town. So its hybrid RTS + RPG. Maybe there is even an construction of zeppelins as ingame element, so there is even some kind of arcade simulator, if you can fly with them.
Something like King's Bounty/Disciples III would be very nice.
If I remember it correctly, project D would also expand dragon gameplay from Divinity 2. Maybe there will be dragon parts as the "arcade simulator" thing.
