Posting a fan idea of mine. It's still in its infancy.
Themed Around:
Cassie Sandsmark & Nessie Kapatelis
Supporting cast:
Diana, Donna Troy (?), Robbie Long (?), Julia Kapatelis, Helena Sandsmark, George Redmond, Eileen Flowers, Young Justice (Tim Drake, Kon, Cissie King-Jones, Bart Allen, Greta Hayes).
Plot
Diana and Nessie stay relatively close even after Diana moves away from Boston. Most of the early Cassie era happens as canon, but Cassie never goes to Zeus. Instead, Nessie ends up being given the mantle of Wonder Girl somehow.
Nessie becomes Wonder Girl. Cassie does not. Cassie becomes jealous of Nessie. Nessie joins Young Justice (taking Cassie's role in the line-up), which makes Cassie even more jealous. IMHO, I don't ship Nessie with Kon, but I could still see Cassie *thinking* they're a thing and being jealous at it.
Unbeknownst to Cassie, she is a demigod through a godly parent. I write her as Ares' kid, but you can keep her as Zeus' kid. It doesn't matter too much who sired her. Just that Cassie is unlocking her metahuman powers and doesn't initially realize it.
Cassie is groomed by a villain, similar to how Nessie was. I write it as Ares. Maybe it could be Circe. I don't know. I just know, they present themselves as benevolent (and maybe don't even show their true selves) but egg on Cassie's green-eyed streak.
Cassie ends up distancing herself from George and her friends. She focuses more and more on Young Justice and especially Wonder Girl. Secretly, she's training after realizing her powers. She makes her own civvie superhero costume, akin to her classic WG outfit but without the wig.
One day, she attacks Young Justice. Enter... uh... edgy Cassie Sandsmark. I haven't decided on a name for "anti-villain Cassie". I just call her by her name.
Misc notes
- I imagine Nessie as looking a lot like Trinity, though maybe using a skort-looking style similar to Diana's classic culottes.
- Nessie and Cassie are roughly the same age. At most, Nessie is older by a year.
- Cassie and Nessie are a "tomboy and girly girl" duo when it comes to character designs. Cassie uses her original 80s look with the pixie cut. At most, she has the longish bob she had circa 1999. Nessie is... well, Nessie. Long, curly brown hair.
- I like a height difference between Vanessa and Cassie. 5'0-5'4 (154cm-162.5cm) Cassie and 5'9+ (175.cm) Nessie
-I set this in the 1990s, but it could be set more modern day as well.
Optional Soundtrack
- Jealousy x Pacify Her mashup