Fans can only imagine, following the reveal in Justice League, General Swanwick’s Martian Manhunter would’ve been a major presence in the next movie Zack Snyder had planned.
In DC Comics lore, Martian Manhuter is J’onn J’onzz, who is accidentally transported to Earth and becomes a founding member of the Justice League.
There have been fan theories about Swanwick as Martian Manhunter since Man of Steel came out in 2013.
We have a new Batman after Snyder’s Ben Affleck, and rumors that Henry Cavill is done as Superman.