Green Lantern John Stewart is joining the cast of Man of Tomorrow as Aaron Pierre signs on for the Superman sequel

James Gunn's Man of Tomorrow is shaping up to have even more DC heroes in the mix as Aaron Pierre has signed on to the Superman sequel, following his leading role as Green Lantern John Stewart in the upcoming Lanterns streaming show.

This makes John Stewart's next appearance official (via Variety), and seemingly confirms that he'll be a full-fledged Green Lantern by the time Lanterns wraps up. The series follows Stewart as he trains to replace Hal Jordan as Earth's protector.

Interestingly enough, the trailer for Lanterns indicates that Hal doesn't know Nathan Fillion's GL Guy Gardner who appears in Superman and who will also show up in Lanterns, so we'll have to find out what that means for the DC Universe.

Man of Tomorrow brings back David Corenswet's Clark Kent/Superman and Nicholas Hoult's Lex Luthor as unlikely allies working together to stave off an invasion by the villainous Brainiac, played by Lars Eidinger. Rachel Brosnahan (Lois Lane), Skyler Gisondo (Jimmy Olsen), Sara Sampaio (Eve Teschmacher), Isabela Merced (Hawkgirl), and Maria Gabriella de Faria (The Engineer) round out the cast.

John Stewart makes total sense as the main Green Lantern of the DC Universe (though Guy Gardner is likely to have something to say about it). As a character, John Stewart debuted all the way back in 1972's Green Lantern #87 by legendary creators Denny O'Neil and Neal Adams. But his popularity boomed in the early '00s as the main Green Lantern of the animated Justice League series and its follow up Justice League Unlimited, making him the best known GL to a whole generation of fans.

Lanterns premieres in August on HBO Max. While we wait for Man of Tomorrow to hit theaters on July 9, 2027, you can stay up to date on all the upcoming DC movies and shows that are in the works.