I'll be honest. One of the reasons I liked Divinity II so much was because it scratched an itch Overlord didn't. Being an incredibly powerful... uhm... being and being the absolute ruler of your very own magical island made me feel like I was actually, genuinely in charge for once (even with Talana constantly nattering in my ear).
RTSs and God Games don't really give you that feeling, because you have no avatar in the gameworld and you're fairly disconnected from the action. Dungeon Keeper came pretty close, what with allowing you to be as cruel or as kind to your minions as you liked.
So, I guess, what I'm trying to say here is that, if I get actually roleplay my very own Dragon Knight while also commanding vast armies (or just one vast army) and perhaps even get my very own highly customizable base on a magic island of my own, I might be very interested indeed.
But we'll see.