It's a teaser, not a full trailer, so I wouldn't expect it to be much actual footage. Just enough to pique your interest. Though it is a bit underwhelming even for a teaser. This movie is a reboot, unlike Superman Returns, so it will need to be a bit of an origin story so they can show how *this* movie is different from the others. (For heaven's sake, I hope they get rid of the "Clark is the disguise" of the other movies!)
And trailers always reuse music from other movies.
I saw a shaky mostly out-of-focus copy of the Comic Con trailer (camera phone). It looked interesting... at least, the parts that were in focus.
