James Gunn's Superman reboot movie has a whole team of co-stars (who don't go by the name 'Justice League' in the film) who will appear alongside David Corenswet's Man of Steel. Some, like Nathan Fillion's Green Lantern Guy Gardner and Isabela Merced's Hawkgirl are fairly recognizable. But others, Anthony Carrigan's Metamorpho in particular, are likely altogether mysterious to a majority of casual DC fans.
Metamorpho's inclusion as one of the members of the new Superman movie's non-Justice League isn't unprecedented - he's a DC hero who dates back to the '60s and who has indeed been a part of multiple iterations of the League in the decades since.
