As for villains, I'm more partial to Circe than Cheetah, but I suspect Cheetah would work better as a "next movie" villain. Circe is another figure from myth, and that might feel a little repetitive even if her goals and methods are well different from Ares. Cheetah, OTOH. . . while she may be *empowered* by ancient magical forces/possessed by a god, she's a modern person with motives and beliefs drawn from the modern world. That said, I would *not* recommend some form of tragic lycanthropy type story, about being the victim of a curse. I'd rather go with the "Barbara Minerva, Evil Lara Croft" version, where she is pretty much totally in control of her actions. She just has goals and beliefs that are contrary to Diana's. Diana wants to protect the world from dangerous forces of myth and legend. Barbara wants to exploit them, and is indifferent to the harm they may cause to others. Also, I'd specifically play up the reversal of the normal tropes: unlike most villains, the Cheetah doesn't have grand evil plots that either specifically target the hero, or are just so vast in scope as to inevitably involve her anyway. To the contrary, she normally tries to avoid involving Wonder Woman, because she doesn't ( usually ) want to beat Diana, she just wants to achieve her goals. Diana goes out of her way to *deliberately* interfere in these plots, not because they target her and hers, but because the plots themselves are wrong. "The Cheetah sells a magic idol to a rich dude in Indonesia that lets him extend his life by shedding blood" is something Diana stops, because its wrong, not because it would harm her. Emphasize that Diana is a proactive hero.