The upcoming Superman film sparked a debate about whether the character should wear his iconic red trunks. Actor David Corenswet argued that the trunks would make Superman more approachable to young fans, a sentiment that ultimately convinced director James Gunn to include them in the costume. Gunn initially preferred a more practical suit, but Corenswet's point about Superman wanting to be liked and seen as a symbol of hope swayed his decision. The film's aesthetic choice will likely influence the looks of other iconic heroes in the DC Universe, with Superman scheduled to hit theaters on July 11, 2025.
Source: https://comicbook.com/dc/news/superman-reboot-trunks-costume-design-explained-james-gunn-david-corenswet/