Cooleatack
Chieftain
Cuba could be very cool, though Castro is too controversial to be included, which would be largely the point of including them. Maybe with Che Guevara? Though that probably makes it worse.Speaking of Anacoana, I think the Caribbean is a region of the world that has potential for a civ representative in a future installment of the game.
Haiti could be interesting to call some attention to slave uprisings and the darker aspects of civilization, as the rest of society moves for that as well. Also, if they ever decide to put Napoleon back into the game, it would be a nice foil to him heh/
Other than that, I could maybe see a New Providence Pirate civ if they are releasing three season passes haha. It would be cool although 9/10 civfanatics would be upset this came in instead of X civ.