UPDATE: Zack Snyder has confirmed that my theory on the humans hanging upside down were meant to, in fact, be turn into Parademons. The story is continued in its original form.
After that, we see what could have easily been a fully realized horror film, with bodies hanging upside down for, what I assume, Parademons saving them for some reason. I’ll explain my thoughts about what the humans hanging upside down in a cocoon state might mean on the next image. However, it’s interesting that Batman is alone here, observing everything. That makes me wonder if Batman originally was the only one who discovered where Steppenwolf’s lair was, which is why he eventually gathers the League.