Sim Elemental?
It seems to me that Elemental is a perfect platform for a sim game. Well, perfect is a strong word. A pretty damn good platform. The game already has some really good "sim" moments, the city construction is very strong. You could make a decent Supreme Commander 2020-esque geo-political simulation, or an even better city builder. And if you're just making a fantasy city builder like Settlers, then you'd hardly need to do any work at all.
What do you guys think? Do you have a "sim" itch?