Races that are mentioned in the game and may exist.

Definitely, the Serpent Guard and the Naga. They have their own gods that they worship. Moreover, at the moment, these dragons are "not involved." The Serpent Guard will most likely represent a mixed race with various creatures, but humans will certainly predominate. The Naga are a race of reptiles or other marine animals. Perhaps they will come up with a unique landscape associated with water. Maybe they will have an advantage in naval movement :) The Swamp is unlikely; many creatures have been "stolen" from it, and the city itself essentially represents the Dwarves (the same name, fortress, slow but very strong creatures, a clear preference for defensive tactics). Nigonia will not be included; it is unlikely that Ubisoft will create a second city in the Dungeon. And it doesn't fit into the history of Ashan. The Palace is the fantasy of one person (Mugaise, if I'm not mistaken). It is his personal and unique idea. Undoubtedly, the idea is good, but it is not worth hoping for its appearance...