Before the Dawn

This might not be an Easter Egg, but rather some speculation. And it’s all based on the tone of Batman v Superman, as well as on a long-awaited movie.
The second part of Batman v Superman is all about the Dawn of Justice. And this might just be about the moment before the Justice League assembles, with (almost) all of the members being mentioned. However, this could also refer to something else.
In the media, Lex Luthor says that Superman is the herald of Dark Justice. Now we may be reading too much into this, but there are two possibilities, one already explored. As said, it can all go downhill, with Superman turning evil after the death of Lois Lane.
However, it could also be a subtle nod to another DC property called Justice League Dark – after all, darkness precedes light. We have no idea how this could play out in the DCEU – but we do know that a Justice League Dark was already written by Guillermo del Toro and is waiting to be announced.
