Re: Superman vs Batman movie to feature Wonder Woman?
If Wonder Woman and Aquaman are going to be tied to any other heroes, it should be to each other. There was a war in Heaven, and Olympus was fractured. Ares created the Olympians and Temyscira as a perfect warrior race. Poseidon created the Atlanteans in his realm of the sea. The Olympians would be beings similar to "Those Who Came Before" (actually nearly identical).
Then a film exploring this split in Olympus can be seen in a Wonder Woman vs Aquaman film.