hmm, I like this topic, of course as always I have about 50 million ideas, Ill just give two...
Previously I thought up on AE a Silk Road game thats about building a central Asian trading cityand managing it and commanding nomad armies....
Right now though what I would really like would be a massive real time 3d tactical combat extravaganza (not age of empires but more medieval total war type, you know the kind that takes actual skill) with a in depth political management system. I dont care what era personally, I would probably like Rise of the Arabs-Rise of Timur most, and I want all of Eurasia to be mapped out with all factions including nomad tribes totally playable.