POTENTIAL SPOILERS FOR BvS
I was looking through the cast page on IMDB and noticed that there were 4 roles named "Nairomian Crying Woman." Not knowing what that was, I googled it and found an archived thread from 4chan that contained possible spoilers for the movie.
It's a Superman cult that's been spreading in the Middle East. They attack a war-torn place, Nairomi, where Superman is forbidden to go by the local government. Lois Lane is there covering the conflict and, when Superman intervenes to save her, the cult bows to him, and the Nairomian government believes Superman to have been part of their campaign and threatens retaliation against the United States government if Superman is not punished.
Superman is then called to a congress hearing in Washington, D.C. to decide his place in the world, which Lex Luthor bombs, leading to the deaths of several politicians and innocents, sowing political turmoil and leading to a global backlash against Superman. Batman is among the ones that believe Superman is out of control, while Superman is manipulated into believing Batman is behind the bombing, setting off their conflict.
I think there is some truth to this. First is that it is revealed that the Superman cult attacks a place called Nairomi. That is backed up by the IMDB cast page listing actresses playing Nairomians. Second is that they claim there is an explosion at Congress. In the Comic Con trailer, we know something bad happens there with the shot of Lois and the protesters looking frightened and ducking down. The thread is also dated 4 months ago and knew about the Congress hearing before it was revealed in the Comic Con trailer.
I love this. And it lines up with that stunt guy saying how the horse scene with Lois is at the beginning of the movie.