Daer funcom, if you were to make an Aztec/Incan/Mayan based DLC ( loosely of course ) I would literally give you all my money. You could do building parts based off sandstone but recoloured or retextured and have things like Macuahuitl instead of a Greatsword and sacrificial daggers for the double daggers.
They are focusing on actual races representing in the Conan setting. And probably already have plans for what they are going to release in 2020, ie which four they will pick.