So often trailers will completely give away the majority of a film’s plot, making it almost unnecessary to bother seeing the full movie.
What’s interesting is the apparent disconnect between blockbuster’s trailers and the footage which actually makes it into the final product.
And then there are trailers for major franchises like Star Wars, which will often contain frames and scenes which are nowhere to be found during the movie’s runtime.
You want your film to be highly anticipated, but that also comes with added pressure of pleasing moviegoers who have spent the last few months devouring trailers and stills.