https://wccftech.com/civilization-vi-korea-rise-and-fall/

As most would-be world conquerors are already aware, Civilization VI announced its first full expansion, entitled Rise and Fall, last week. Following a year of piecemeal DLC releases, Civilization VI: Rise and Fall will introduce a hefty helping of new features and content, including nine new leaders representing eight civilizations. Unfortunately, Firaxis didn’t actually identify any of the new civs being added. Who will be crushed under our iron heel next? Civ fans demand to know!

Well, Firaxis has thrown us a bone, revealing the first new Rise and Fall civilization – Korea under Queen Seondeok. Korea has been a series staple since Civilization III, but this is the first time we’ve seen this particular leader.