A Sucessor Mod would be good, but you'd need a huge map and some way to have loyalist rebellions happen a lot of the time, so you wouldn't have to conquer every single settlment.

I was thinking of something like Seleucis having say a Eastern civilaistaion and cities like Babylon having Eastern buildings, Ptolemy with Egyptian, Lysimakos having a Barbarian culture and Antigonous having Greek culture. you could in theorey make a mod for it, but you'd have to put greek looking buildings into the other civilsations. And modify tech trees etc.

You'd also have to pick about timing (more than 2 turns a year)and movemnt points, otherwise it would take 50 years to move an army from the Indus to Antioch.

And you'd have to find a way to keep someone interested in playing the game.

LOL, so anyone want to?