Chaos is very tribal and violent in general. They would practice a tribal system similar to the pagans in game. This could easily be substituted for a feudal system in game as they are relatively similar.
There are 3 planned invasions so far. Chaos and orc invasions will be modeled by the Mongol system of invasions. We are planning on having it so that if the player forms a chaos empire before the invasions of chaos is set to occur it will stop it from happening. No real reason to have two everchosens of chaos on the field at the same time unless it happens by pure chance.
Also Kislev should have two cultures Gospodar in the south and Ungol in the north and west.
I so far have done the counties for Bretonnia, the Empire, Tilea, Estlia, Troll Country, and Kislev and can say now that there will need to be map revisions for the territories but that can probably be done on implementation.
Another question are we going to include on the map the Blighted Marshes? Or are they going to be the same as Athel Loren?