There is a rumor that WB tossed out Will Beals script. Apparently the script is horrible and that the quality of the screenplay is why they couldn't get a good director. Which means different plot, different characters, hopefully they go with the original team. Read it here http://collider.com/justice-league-movie-script-scrapped-will-beall/
I think this is a good thing most likely, JL movie will probably be pushed back and a new and probably better writer.