If Latino Review is to be believed, the evil force which Superman, Batman, the Green Lantern and Wonder Woman will do battle with is none-other-than Darkseid.
Created by Jack Kirby in 1970, Darkseid is a dastardly god from the war planet Apokolips, and ranked at number six in our list of the Greatest Comic Book Villains, where we described him thusly:
“Darkseid’s motivations are rather simple – conquer and control all life by unlocking and solving the Anti-Life equation.
“Perhaps the most appealing trait of Darkseid is his lack of interest in direct physical confrontation… he has immense strength, endurance and eye beams that can disintegrate, teleport or torture opponents, yet he chooses to manipulate events from the shadows, allowing his minions to act on his behalf.”
So if Warner Bros. retain this behaviour, expect Darkseid to the first of several villains to be announced for the Justice League movie.
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Justice League Villain Announced? - IGN