The Dark Night Trailer from Comic-Con

Teaser trailers do that, in order to build up buzz. They did the same for the first Spider-Man.

yeah but an entire year? most movies don't have trailers that early

Like I said above, Spider-Man teaser trailer was a year in advance. Same with this year's Star Trek.

Earlier this summer we had The Last Airbender and Toy Story 3 teasers out and they won't come out until next summer. So if it's a big enough "event" movie, it's not that uncommon.

i guess it is more common now because it was never like this before. are you talking about the first spider-man from 2002? got a link to that teaser?

Yep.

/watch?v=7xNgtWG09TQ

The fact that the WTC is featured prominently in it definitely dates the trailer. I saw this in front of Final Fantasy: The Spirits Within, which came out in summer of '01.

Also was a teaser trailer for The Lord of the Rings which premiered in January of 2001, and the first film wouldn't come out until that December:

/watch?v=2iwQlAASorQ

So, like I said, a year in advance is huge, but not completely unheard of.

thanks for the links. like i said before its a more recent trend. must be a 2000 thing.