Yes i might use a map similar to the map from Rise of Nations : Thrones and Patriots Alexander The Great Campaign , which streches from Carthage,Italy,Sicily to India and China

This gives me these factions:
Romans
Macedonia
Greek cities (not one faction but seperate )
Thrace
Persia
Pheonican States
Indian Tribes (at the moment one faction )

And other Rebel Factions such as Chinese



Roman Units:
rome will be all Pre- Gais Miauis Event Units so same tech tree but without imperial palace.