Edited together as part of a 60-minute making-of feature, the seven-minute video shows Gunn walking Corenswet through Superman’s big final confrontation with Nicholas Hoult’s Lex Luthor, and specifically the moment when the Man Of Steel reminds Luthor he’s just as human as the rest of us.

"I love David," says Gunn. "One of my favorite actors I've ever worked with. He is wonderful. He also questions everything."

The DCU Superman's most important ending scene appears to have benefitted from Gunn and Corenswet initially coming at it from different perspectives.