In an interview with the LightCast Podcast, Harry Lennix, who plays the role of J’onn J’onzz, the Martian Manhunter in the film, revealed that his scene in the movie was originally meant to include the Green Lantern, John Stewart.
In the past, Zack Snyder had also confirmed that his original plan had been to feature three black superheroes, actor Ray Fisher’s Cyborg, the Martian Manhunter, and John Stewart as Green Lantern.
It was going to be Martian Manhunter and John Stewart.
Unfortunately, the studio had other plans for the Green Lantern franchise and forced Snyder to take Stewart out of his story.