I'm looking at the link now. Poland is a bit of a surprise. There are a lot of Polish Civ fans who have been pushing for them forever (although the last expansion had quite a bit of European civs). The changes to cultural victory are quite a surprise, but I'm intrigued. Trade routes could work, although it's odd that they're using a civ2 system.
O Brave New World that Has Such People in It.
ETA: That siege tower unquestionably looks Assyrian, so we might finally see the Assyrian Empire in the game.