Today is officially Justice League Day, with more and more info arriving by the hour. This time around, those who have visited the set have described two particular scenes. In one of them, Batman meets the Flash for the first time. In the second one the entire Justice League is assembled, most likely for the first time.
These scenes are courtesy of Steven Weintraub, from Collider.
The Batman and Flash meeting
This Justice League scene was screened without the finished effects, most likely to show that the DCEU can be fun. Barry Allen (Ezra Miller) arrives at home, to find Bruce Wayne (Ben Affleck) sitting in his second favorite chair. Bruce reveals that he knows Barry has special abilities, and Barry tries to counteract everything with humor. After he has had enough, Bruce throws a batarang. In response, Barry enters into Flash mode and catches it.
After examining it and realizing that Bruce is Batman, he slows down. They both reveal what they know. Flash agrees to join the Justice League, but asks for the batarang. According to the source mentioned above, everybody present at the screening was laughing.
On the rooftop
The second Justice League scene was screened earlier in the day. It sees Commissioner Gordon (dressed just like in the comics) next to the Bat signal, talking with Batman, Flash, and Wonder Woman. Gordon says that scientists have begun disappearing all over the place. According to our source, the scene looks just like a comic book panel coming to life.
In the middle of the discussion, Cyborg arrives, saying that the head of S.T.A.R. Labs has also been taken. To be noted, this seems to be the first time Cyborg joins the Justice League, since Wonder Woman is seen smiling with satisfaction. The newly formed team decides to go and further investigate.
As Gordon turns his back, everybody disappears. Only Flash remains. As the source notes, he didn't get the memo that when Gordon turns to talk you need to quickly disappear.