If Diana reverts back to her clay origin (which I hope happens), I'd be okay with Cassie reverting to being a child of Zeus - although I don't prefer it. I'd prefer it was another character.
Except, I don't want it to be Heracles. Mostly because I have other plans for him in my Wonder Woman Series Bible Thingee. I think I've come up with a good origin for Cassie that's also fun. We'll see.
The only thing I ever really liked about Cassie's Zeusian origin was her thunderbolt lasso. That was clever.
So for me, it's:
Diana - Molded from clay and given life and tremendous powers and abilities through a combo of Hippolyta's love and the blessings of the goddesses and Hermes.
Donna - Orphaned girl or tween from Patriarch's World, who was saved by Diana, and brought to Themyscira to be raised by the Amazons and as an adopted daughter of Hippolyta, Queen of the Amazons. Donna gains superpowers from the Amazons in tale that has yet to be told.
Cassie - Daughter of Helena Sandsmark and an unspoken of man from Helena's past. Cassie has asked before, but Helena has been short in providing details. Which is odd, consider their relationship. It's a mystery that's about to unfold whenever I become a writer or editor at DC Comics.
Achilles - Reborn via the heart of a god and the soul of the ancient hero as an entirely new being. Takes up the mantle of Warkiller in his battle for peace.
Fury - Powerful and formidable daughter of Wonder Woman and Steve Trevor from Earth Two, Lyta Trevor, with whom the Wonder family of Prime Earth are recently reconnected with. A founding member of Infinity Inc. and heiress to the throne of Themyscira.
Jason - Embittered, sometimes-ally of the Amazons after learning the true nature of his creation and birth.