Searched it up and found this screenshot someone took from a livestream in civ fanatics

Ok well what about Songhai? Their Game Guide hasn't been released yet.

But their abilities were revealed in a livestream.

I would assume that Dur-Sharrukin being wonder would mean that we may get the Assyrians as a civilization (Since Dur-Sharrukin was their capital during the reign of Sargon the ll of Assyria (Dur-Sharrukin - Wikipedia) like how in civ6 there was Sumeria and Babylon. And since we have hanging gardens, we can assume Babylon will be a civ eventually. (Fun Fact, Dur-Sharrukin translates to Fortress of Sargon in English which I think we can all agree is just sick (Cool).