CBM says

Now that the filming is complete on the Zack Snyder-directed Superman reboot, Man of Steel, it's more and more likely that we will get a first look at the trailer sometime this summer. A couple of days ago, I was sent a very in-detail description of the rough cut trailer for the film, which Warner Bros. has been developing for a while now. I should mention that this might not be the final cut; just one version they're currently working on. So, that explains the "Rumor" you see in the headline, because nothing is confirmed just yet. The person who sent this to me worked on the film. And judging from info he told me personally, the source is very well legit as far as I'm concerned. The description is, like I said, very in-detail and contains some interesting stuff. Check it out below: (Cinema, Man of Steel)