To me their are two types of WW villians.
1. Villains that represent the dangers of man's world. These are your Veronica Cales, Dr. Cyber's and Angle men. These villians tend to have tenuous connection to myth, and in fact tend to be science base (take a drink every time you hear the word docter used when referring to a WW
2. And myth based villains. And I mean myth in general not just greek myth which I feel would be far to limiting. Part of WW's development should be her encountering other cultures and the gods and heroes associated
With them. Myth based heroes include Ares, Circe and Cheetah.
You also have villains that I feel are in one catagory but would be more interesting if placed in the other. To me that includes Giganta who I really feel would work better as a more myth.based character.