I wonder if a new DLC will be based on 'successors' so for example - Briton, Western Roman seperatists, Illyrians etc etc.
As Geats I currently own all of the British Isles (except Ireland, but their my allies) and all of Sweden/Norway and Denmark. I've got 3 full army stacks, 1 in Britain defending against an Ostrogoth invasion, and the other 2 are invading the lands that Border the Baltic. Currently going well, except for a little bit of a public order problem as I have 2 neutral hordes raiding my lands the bastards.
Also Briton faction recruit Roman units haha