I had an idea. I haven't been involved in the NESsing stuff for quite while, but this idea struck me as somewhat interesting.
What if you'd combine Nessing and the Total war games. You could have a traditional NES, say a medieval period or a fantasy one. The economy and storyline would follow conventional NES structures, but the military confrontations would be played on the Total War multiplayer. The amount of troops on the field would be determined by the economy and military unit available in the context of the NES.
Each of the players would select a faction in the total war game to serve as the unit selection of his NES faction. The TW faction would have to be roughly suitable to the culture of the players kingdom, empire or faction in the NES. So, for instance, if you are a fantasy NES faction called "Urabs", an oriental style faction with a style and culture reminiscent of the Arabs, you could pick the Saracens in the Medieveal total war. Likewise, if your NES civilization is an occidental one, like say a Gondor/Lordaeron style western kingdom, you could pick the French or the Holy Roman Empire from the TW factions to represent your army in the field.
Since this is a Civilization game forum, I'm under the impression that there would be quite a few with at least Medieval or Rome total war games.