From the early access page:
"Unique Maps for Towns, Castles and Village: Although we plan to create unique maps for every town and castle in the game, it is a rather arduous process to create that many well designed maps and as such, different locations may share the same map during early access."
My take away on that is if they haven't even finished making unique maps for the current campaign area this would be a long way off. As others have pointed out I'm sure they have plans for future expansions though.