I would be highly dissapointed.
My ideal S4:
-Eagle
-Lovecraftian(Main villain)
-Wendigo(Coven related)
-Samurai sword guardian
-Sol Dakuri, General from Babylonia, possible member of Kan-Ra’s complot against the king
-The real Tsar. He could be the noble from Kan-Ra’s complot against the king. (Coven related)
-One old prototype from Ultratech’s abandoned laboratory(Ultratech related)
-The Alien whom Glacius was pursuing when he arrived.
-Bonus character: Jo Dark OR the last Ichorien alive