James Gunn says the treatment for his 'Superman' sequel is 'totally done,' and that shooting will begin 'much sooner rather than later.'

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."