The picture is too blurry to clearly make out exactly what Batman is fighting, but they clearly aren’t human.
The logical assumption is that they’re Parademons, the soldiers of Darkseid.
It’s possible the Parademons, or some other soldiers of Darkseid, possess a similar look to Cyborg if the ruler of Apokolips used his Mother Boxes to create them.
Snyder captions the image with “Down at CO3 with Stefan,” referring to Stefan Sonnenfeld; co-founder and president of Company 3, a co-production house that often handles color correction.