So all of the cultures for the first half of the game have been revealed already (Ancient-Medieval). Let's speculate what could be the remaining cultures for the next three eras (yes, we're playing this game again but for Humankind). Based on the OpenDev announcement, the two cultures that they've announced but have yet to be fully confirmed are the Koreans and Japanese. I'm speculating they're both in the Early Modern Era, with the Koreans as Scientist and Japanese as Aesthete. Any other thoughts on the other 28?