Parademons (DC Extended Universe)

"I had a dream; it was the end of the world."

- Bruce Wayne regarding his vision

Parademons are a villainous force in the DC Extended Universe, first appearing in Batman vs Superman. They are set to return as an invasion force in Justice League.

Batman vs Superman
Bruce Wayne has a nightmarish hallucination of an apokalyptic future. In it, Gotham has been laid waste to and in a scorched wasteland before the city, a huge Omega symbol is burnt into the ground. In a change of scenery, Batman witnesses a group of people being slaughtered by an unknown military force as suddenly, winged humanoid beasts attack the group. As Batman is fighting the soldiers and is slowly overwhelmed, the Parademons land nearby and watch until the soldiers press Batman to the floor, at which point one of the Parademons knocks him out with a strong blow to the head. It seems that in this vision, they are allied with Superman because they then deliver Wayne to Superman himself. The vision is one of the reasons for Batman's feud with Superman.

After Batman has put his dispute with Superman aside and the two have joined sides to defeat Lex Luthor and Doomsday, Bruce - out of fear of the nightmare and the invasion coming true - starts assemble a group of meta-humans to defend Earth. Thus, the Parademons are indirectly responsible for the beginning of the group that will later be known as the Justice League.

Trivia

 * In the comics, the Parademons are an army loyal to Darkseid, the leader of the planet Apokolips.