Superman: Legacy keeps having the most surprising announcements made concerning its cast, with many of these characters being separate from the Superman mythos entirely. The latest of these heroes to join the fray is the shapeshifting elemental Metamorpho, who's played by Anthony Carrigan. While it might seem random for him to have any sort of role in the film, he's likely there to establish the presence of another team.
Source：https://www.cbr.com/superman-legacy-metamorpho-casting-terrifics-dcu-tease/
