John Stewart was an architect and a former U.S. Marine, who was selected by the Guardians of the Universe as Hal Jordan's backup Lantern after Guy Gardner was seriously injured. Although Jordan objected initially after seeing that Stewart had a belligerent attitude towards authority figures, the Guardians stood by their selection and Jordan complied, equipping Stewart with the standard uniform and power ring.
- During the battle between the Green Lantern Corps and the Sinestro Corps in Metropolis, the player will join with John Stewart to battle Sinestro.
- During the battle between the Green Lantern Corps and the Sinestro Corps in Metropolis, the player will join with Sinestro to battle John Stewart.
- Green Lantern (John Stewart) first appeared in Green Lantern #87 (January 1972).
- John Stewart was the first African-American superhero to be created in the DC Universe.
- John Stewart's voice is provided by voice actor Ken Thomas.
- As an architect, John Stewart was responsible for the design for the JLA Watchtower.