Lord Lakely
Idea Fountain
The Horse-head Civ is most likely one of those yeah. I thought about Xiongu because they were led by a Confucius AI.Scythia seems like a popular inclusion in Civ6 and could return again. Or they could bring the Huns back--they might fit better in Civ7 than Civ5. Or they could really surprise us with the Rouran or Yuezhi or Xianbei or Xiongnu since they don't necessarily need a leader.
Otherwise, would a horse's head be a viable icon for potential Sogdian Civ?