The scene is definitely a setup for the Justice League movie.
Lex is 'getting arrested'.... while learning about Darkseid from the AI computer aboard Zod’s ship.
This is Steppenwolf... Darkseid’s Uncle... and the General of his Army.
In the video clip, the ‘spheres’ seen floating above his head are the planets in their solar system (i.e. New Genesis & Apokalips) which is located somewhere near Orion’s Belt in the comics.
These planets exist in a parallel dimension, but travel between New Genesis and other worlds is only possible via technology known as ‘boom tubes’ (dimensional gateways that cause a ‘sonic boom’ when created).
On their planets, the gods of New Genesis & Apokalips are giant-sized beings… but travelling through the boom tubes requires them to be ‘scaled down’ to mortal (human-size) proportions.
So in the upcoming Justice League Movie, (if they come to Earth) Steppenwolf will look like a regular human:
Which means the cubes in the clip, are the ‘Mother Boxes’ that create the Boom Tubes.
Zod’s ship would have the similar technology as Kal-El’s ship (since they are both from Krypton)
As seen in MoS, when Jor-El tells Clark about the ‘History of Krypton'.... the Kryptonian shipboard computer creates a ‘collage’ of silvery-looking images:
So Zod's ship does the same thing...
And in the ‘Communion’ clip, we see these same images of Steppenwolf ‘disperse’ the same way it worked on Kal-El’s ship, in MoS, when Lex gets arrested.
Just my guess...
- Steppenwolf is the 'main villain' of the first Justice League 1 movie.
- Darkseid is the 'main villain' of the Justice League 2 movie sequel.
Making Steppenwolf the 'main villain' FIRST makes sense... because then they could include that chic
Fury (who is a half-Amazon)... and give Wonder Woman a kick-ass opponent (like how Zod had that chic Faora at his side, in Man of Steel).