I love your idea Tim with the next generation console discs being able to hold more content there is no reason why Bethesda couldn`t have two smaller provinces contained in one game. I agree with your idea on the border region too, as it would make sense to have it heavily fortified with large forts, small outposts and regular border patrols, making it harder for your character to cross over the border for whatever reason. Be interesting to see what Bethesda will come up with next hopefully something similar to your idea though, would be good.