In it, we see a young Clark Kent struggling to deal with his powers, before leaving town and discovering himself and deciding the type of man he wants to grow up to be. As his father says, whoever that man is, he's "going to change the world." Then, it's a battle against some sort of powerful force, before soldiers turn on Superman... explaining the movie poster saw. Why? It's still unknown, but as Superman's voice explains in the trailer, man rejects him when they find out who he really is.
Man of Steel features Henry Cavill, Russell Crowe, Amy Adams, Kevin Costner, Michale Shannon, Diane Lane, and Laurence Fishburne. It's due out June 14th, 2013.