five bucks
Knight at Arms
To me, and from what I've seen quite a few other people as well, a big appeal of Bannerlord and Warband is its very close approximation of the real world medieval period in a Europe/MENA setting.I mean, Mongolia is likewise super far away from France yet there was a not-Mongolia in Warband so it's hardly unprecedented. Besides, this is a fantasy world, any two-bit writer could justify civilizations based off historically far-off ones being close by with minimal effort. They could even place a not-Korea in that cold peninsula northeast of Sturgia and have isolationism and big boats as the reason why they don't appear in Warband; they're too isolationist to leave and too boat-loving to be invaded effectively lol. Maybe stick not-Japan in the not-Arctic Sea while they're at it lol.
With that in mind, throwing in random other parts of the globe would take away from it for me (though I'm free not to buy the expansion, it would presumably have other features in it that I'd want) and presumably some others too.
But I would love to see an expansion which adds optional campaigns on a whole new map in the "M&B world's version of Asia" region, rather than trying to tack it onto the existing map.