We’ve already seen a teaser and a trailer for Zack Snyder’s Man of Steel, but screenwriter tells Total Film that they have kept most of the movie a secret so far.

“It’s something Chris [Nolan] tried hard to do with the Batman films,” Goyer said. “I’m genuinely pleased with how much secrecy we’ve been able to maintain. There’s so much of the movie that people don’t know, that hasn’t been touched upon. The trailer’s just the tiniest, tiniest tip of the iceberg.”

Goyer also talked about whether or not this Superman movie will be darker. “Relatable and realistic doesn’t necessarily mean dark. I think it would be inappropriate for us to approach a Superman film as if we were doing The Dark Knight. The Batman films are a lot more nihilistic; Superman has always been a story about hope.”

Opening in 3D, 2D and IMAX theaters on June 14, Man of Steel stars Henry Cavill, Amy Adams, Michael Shannon, Kevin Costner, Diane Lane, Laurence Fishburne, Antje Traue, Ayelet Zurer, Christopher Meloni, Russell Crowe, Michael Kelly, Harry Lennix and Richard Schiff. You can watch the trailer from December using the player below.