the only trailer that made me go "Ooh, that looks good" before the Da Vinci Code (for JK review see Tipsheet board) was...
No, I'm embarrassed even to say it.
No desire to see the earlier films.
No interest in the concept at all but...
it looks to me like the surprise Summer Blockbuster will be...

The new Pirates of the Caribbean film.
The trailer is amazing. Very effective, very funny, very well done.
If the film is half as good as the trailer, I'm hooked