Fans may have identified the Green Lantern seen sacrificing his life at the beginning of the new Justice League film.
The theory was posted on Reddit by a user called StrandingDeath, who deduced that the fleeting shot was of a minor alien character named Yalan Gur.
Justice League features the formation of the titular superheroe team, made up of some of the biggest names in DC Comics. Traditionally, one of the founding members is Hal Jordan, who goes by the superhero name Green Lantern. (Green Lanterns are a corps of space police, so there are many at any one time.) He has not appeared in any of the other DC Extended Universe films, nor was he advertised, but many fans were hoping for a surprise reveal, especially since the tagline “Unite the Seven” was used in early marketing.
In the end, the team was only made up of the six members who were previously stated to appear—Superman, Batman, Wonder Woman, Aquaman, the Flash and Cyborg. However, early on the film discusses the first time that the villain, Steppenwolf, attacked Earth, and showed that a mysterious, unnamed Green Lanterns was ammong our planet’s defenders.
Since this scene is set in ancient times, it obviously is not meant to be Hal Jordan or any of the other well-known Green Lanterns; for that matter, the character in question does not seem to be human. His identity was a mystery that some fans naturally had to investigate.
Saying “In case there was still any doubt about who THAT was in the History Lesson…,” StrandingDeath posted some screenshots from the movie beside some images of the character from the comics. Though the Justice League version is shadowed and hard to see, he appears to fit the figure of Yalan Gur well: he seems to have a cape, has Yalan Gur’s sort of snoutlike face, pointed ears and so on.
Official word is that the Green Lantern in question is not supposed to be any character in particular. For that matter, it should be noted that in the comics, Yalan Gur lived in the tenth century C.E. and ultimately turned villainous; this version was alive thousands of years before that and died heroically against Steppenwolf. Nevertheless, it is likely that the character’s design could at least be an Easter egg, even if it’s not the “real” Yalan Gur.