Originally Posted by Mrs Vimes
That's true. However, while I can think of many occasions when an amazing trailer didn't lead to an amazing movie, I can't think of a time when an unininspiring trailer led to an amazing movie.
I know several people that seemed unimpressed with the First Class trailers and were blown away from the actual movie. I myself liked the trailers but that's just one example of people being uninspired by the trailer and amazed by the movie. Also I thought the early trailers for Avengers looked kind of unimpressive.