Future civs to be added?

What are some civs that are likely to be added in future expansions and why?

Possibly

Ethiopia: not colonized by Europeans (yes yes Italy in 1936), they have a unique and rich history, and made use of interesting weapons and battle tactics.

Persia: largely not colonized (exception of British and Russian influence), again an interesting and rich history, rivalry with the Ottomans, key player in the region, and unique war tactics and potential military units.

Oman: held colonial possessions of its own in Eastern Africa and it was a key player in the Indian Ocean trade networks.

Other possibilities - Morocco, Thailand/Siam, and the Kongo.

Let me know what you think!