Justice League Final Trailer: 10 Plot Points It Reveals

4. Parademon Origins

We've known for some time that Parademons would be used to launch the first wave of attack, but at first it was believed that they'd just be following the more traditional template of the creatures: that they're low-intelligence aliens with a high pain threshold, used to do Darkseid's bidding.

This trailer, however, changes that. We see a soldier on the battlefield of the great, ancient war actually being turned into a Parademon thanks to Steppenwolf and his Apokolian technology, which looks to be how Darkseid gets his army (he's the Night King, they're his wights, basically).

In line with the New 52 version, other Parademons are capable of transforming humans into them, so it's not like Darkseid himself needs to be present for it, and means there's an almost endless supply of them to fight this war.