While Man Of Steel is being released by Warner Bros., Marvel Studios has trained viewers to expect after the credits or mid-credit scenes in superhero movies. In fact, Marvel Studios president of production Kevin Feige once said, "I don’t want to be in that theater for the first time when even two people stay behind and nothing happens, frankly. I like that we’ve trained at least some people to stay behind and get a little reward, but you’re absolutely right it served a different purpose—it was a part of the, 'Hey, surprise! These are connected. We’re building towards something here.'"
With the perception being that Warner Bros. is also building something that will be connected, many have been expecting/hoping that Batman or another DC Comics superhero might pop up after the credits in Man Of Steel. In the screening, we attended more than half the audience sat through the credits after watching Man Of Steel.
As a public service though to save viewers the time of sitting through the credits, we can tell you that there is no after the credits scene in Man Of Steel. While there have been some murmurings that Warner Bros. maybe just didn't include the after the credits scene in the press screenings, it's recently been confirmed that no screenings have after the credits scenes. So when those credits start rolling feel free to get up and leave, you won't miss a thing.
As far as why there's no after the credits scene, Man Of Steel producer Deborah Snyder told Crave, "It kind of feels like it’s a commercial for another movie. This is our story and for us it needed to be its own thing. And I think that’s how everybody obviously is always asking, 'What’s going on in a few…?' And what we’ve said is Superman is the pinnacle, right? And you have to get him right first. And that’s what are focus was. And we see how this all does. Obviously people talk and all that but you just have to focus on what you’re doing right now and get that right first. And this was a complete story and we’re not teasing something. It just wasn’t what we wanted to do. I feel like the film, there’s a class to it, you know."