We had some news of Warner Bros/Dc to start the chaotic work of Just league before the arrival of Avengers, but they after having a great success in the movie they actually delayed the work for it and scripting is been made more strong now.

As we can see that WB/DC are trying to create a huge plot for Justice league like they have signed Ben Affleck as batman, A new superman is been introduced and Gal Gadot will be introduced as Wonder Woman in the next Batman VS Superman. So they are actually preparing for Justice league through these movies and soon they are gona start it for real and the wait will be over.