I hope they bring most of the mentioned veteran Civs (Babylon, Ottomans, Carthage, Byzantines, Ethiopia, Mali, Maya, Inca, Portugal) back. If there are newcomer Civs, I hope they are from less well represented regions, like West Africa. But I'm guessing some of the new ones will be from Europe because of the market there. I hope Mapuche being in the game won't mean the Inca are out. They are not too similar except for sharing the Andes. And I hope Firaxis stays away from more post-Colonial nations. They are just not distinct enough in my opinion to merit official Civs.