Im not opposed to stand alone "expansions" set in different regions but its not really expansions if so, but rather entirely new games or versions of the game.
I would love to see real expansions to the game down the line though. Something inspired by FFG would be great with small expansions that add new cards to the decks and maybe a new game mechanic or two, as well as big box expansions that expand the map and add more dynasties and scenarios!
Considering the basis for this game, the possibilities are endless!
I second the need for actually new rules and not just reskins when it comes to expansions. I think we all want Byzantium and Muslims added to the game. Do you plan on adding such content?