you are wrong. BvS is no team up movie its a VS movie. So yeah JL will the TA where we get to see these characters up agaisnt a huge DC villain. And there are many that wanna see Flash, Aquaman (especially with Momoa's casting) The likely introduction of the NEW GL, Yeah Cyborg i really do not care about he is like Hawkeye,Black Widow of TA which nobody really care about. But the other JL members yeah a lot of people are fans of those.