This development would make plenty of sense within the context of the story because Steppenwolf/Darkseid’s Parademons are often created using captured humans or processed corpses.
Although the specific context of the sequences is fairly different, the way Aquaman is carried off by the Parademons in that shot seems particularly notable.
We don’t think he is simply jumping into their arms to attack them; we believe he is replacing Batman and running off to rescue a captured Man of Steel.
There’s a particularly powerful dead body buried in the Kansas countryside of the DCEU, so it stands to reason that the bad guys may want to get their hands on it so that they can create the most powerful Parademon of all.