6) Mother Boxes Are The Macguffin
As was clear from Batman’s so-called Knightmare scenes in BvS, where parademons and Omega symbols appeared in a dystopian vision of the future, the big threat of the DCEU is Darkseid and his forces from the planet Apokolips. Justice League will hold back on all that, however, as it has been confirmed that Darkseid’s general Steppenwolf will be the film’s main villain.
[zergpaid]The trailer also reveals that the macguffin of the movie will be the mother boxes, cubes of Apokoliptian design that apparently landed on Earth hundreds of years ago (if the medieval warriors who find one in the trailer are anything to go by). BvS arguably threw in the foreshadowing of a wider DC cosmos at the expense of narrative clarity, so it’s probably a good idea that this will be pulled back a bit for Justice League. We wouldn’t rule out a quick cameo for Darkseid somewhere in the movie, though.