The title itself lets me speculate

[Ironwood]

I can imagine it. Does anybody remember that crazy massively multiplayer idea I published a while back? If they could find a cool way to implement it (simultanious/out of order turns, or something), it would be cool to play on a massive map with huge numbers of human civs, particulalry if the "ideal number of cities" were set low, thus necessitating the use of other human players (who may or may not be trustworthy) to keep cities productive.

The idea was more developed than this, but I don't feel like going into it right now.