Zack Snyder confirmed that the Man of Steel trailer will be attached to the upcoming Hobbit film:
"It's fun. I can't wait for 'The Hobbit,' so it will be fun to see our crazy 'Man of Steel' trailer and then enjoy the Hobbit because that's going to be great," said Snyder. "It just feels like a fun Christmas thing to do, drag the whole family out for that action."
So it looks like I'll bee seeing the Hobbit, then.
Edit: Not to be confused with the teaser trailer that was attached to The Dark Knight Rises. This trailer is the same one that was shown at SDCC. Ya know, the one that fans literally cried about. Can't wait! ^_^
Edit Again: I lied about that last part. This is not the SDCC, but it's very similar. It's that, but with some newer footage that I guess they didn't have rendered in time for SDCC. Exciting stuff! The trailer is reportedly 2:20, and the score used in the trailer is either from Gladiator, or very Gladiator-esque.