Re: They are going ahead with a Justice League movie
The scenario was that Batman and Superman stand on a battle field at the END of their film and Batman goes "Here a 4 new heroes" and then it continues in the new film. So there's no "gather the team" storyline in that one. Only a rock ballad.
Sure there is. In the JL movie you intro with the same scene, then intercut flashback scenes of Batman recruiting the other 4 heroes while they finish that battle. Then continue with the movie. It practically writes itself.
Baby, you and me were never meant to be, just maybe think of me once in a while...