There are so many stories for Hercules, and another one like this is a shit. There is no a bit of historical true in it.. More interesting is thestory for the relations between a thracian priestess of a largest sanctuary in Rhodopes (the land of the thracians) and Alexander the Great. And her phrophecy, that he will become conquer of the world. It's described in the book "Rhodopea, the thracian priestess". Better, full of thracian mysteries, rites and treasures... and passion..