I've been enjoying looking at the maps of the current Civ cities found here and here made by @bite . It's been noticed that there are certain gaps or filled-in areas within a civ's territory that suggest some civs are more likely to get in than others. Of course there's nothing definite one way or another here about if a civ will for sure be included or not (especially considering how much overlapping territory some civs like the Byzantines and Turks have or just how large and therefore spread out some civs cities are), but I thought it would be fun to speculate considering the time we'll have before the next dlc or expansion. This doesn't include city-states since we already know their potential to be full civs like Korea and the Neatherlands. Arabia - I was reminded recently that several Yemeni cities are in Arabia's city list so the chances of a full Yemen civ aren't looking good. Many Syrian cities are also included so Syria isn't looking likely either unless ancient and classical Syrian cities were known under different names (like Egypt's) to avoid clashing city lists. I'm not certain on this but I'm assuming that there wouldn't be much or any overlap of city names between Arabia and the kingdom of Judah. Rome - Carthage and Byzantium are already really obvious and are almost guaranteed to get in regardless of the cities of other civs. However, that Rome map does make it even more obvious to expect their inclusion in the future. The inclusion of Artaxata and Palmyra does make it look like Armenia and Syria aren't that likely to be made full civs. Persia - They also have the same Armenian city (called Artashat here) so its another point against Armenia. Chances are that several of Persia's cities probably make many other Middle Eastern kingdoms like Uartu and Media less likely to appear. On the plus side, there is plenty of room in Mesopotamia for Babylonia and Assyria. Persia does have Marakanda but the capital of Sogdiana can be called Samarkand to avoid conflict. England - They had room for Scotland to appear and it looks like they could fit in Ireland and Wales as well. I'm assuming there could be room for a Briton civ if they really want to include them. America - The most obvious absences here are any cities from Hawaii and Alaska. That makes it a bit more likely for us to see the kingdom of Hawaii and the Tlingit make an appearance. There are also many other spots within American territory that have room for a Native civ (especially in the west, parts of the south and northeast, etc.) but thankfully the Native civs should have different city lists anyway so many groups like the Iroquois, Navajo, Choctaw, etc. should be fine regardless. The only exception so far appears to be some of the Pueblo groups that don't want their ancestors depicted in media. Spain - They've obviously got some room saved for Portugal! Russia - They have a ton of room in Siberia if Firaxis ever wanted to add more civs there. The only choice I could think of if there had to be a Siberian civ would be Yakutia. Yakutsk is on Russia's city list but it could be called Jokuskai in Yakutia's city list. Khazaria could probably fit in if it was desired but it looks like Kievan Rus would have some overlap with the Russian cities. India - It doesn't seem like we'll get the Chola or Mughals due to their overlap with Indian cities unless there are plans to get more alternate leaders for India. Australia - Australia does have plenty of room for a civ in the central and northwestern parts of their territories, but it seems unlikely given that the Aboriginal Australians don't quite fit in as a civ and I recall hearing that (like some of the Pueblo) they don't want to see their ancestors depicted in media. China - There is plenty of room for Tibet but unfortunately China's attitude about it doesn't make a Tibetan civ likely without losing the Chinese market. Feel free to point out if I missed anything.