A new expansion has been announced for mid-January, trailer below.

Seems to be about the Yellow Turban Rebellion and how people like Dong Zhou, Cao Cao and the other guys we know from the main game (and history of course) came to where they are at the start of the coalition and the game. Very interesting so far, I think it's better they focus on characters we already know and like, as well as some new ones of course, than their approach with 8 princes.

There's also a Steam DLC for Tao Qian, looks like a FLC playable faction for the Three Kingdoms main campaign, which is excellent news!