The trailer is not the movie

"(...) Trailers can make great, original films look tedious and unoriginal. They can also make mindless, obnoxious spectacle seem explosive and exciting. They’re advertising, and advertising is often cynical, homogenous, and fundamentally dishonest. At the same time, I don’t want to be overly critical of trailers, because they serve an important function. When I was a kid, the coming attractions were my favorite part of the moviegoing experience. And there are trailers that reach the level of art, that are masterful excursuses in storytelling and editing in their own right (...)" [Fonte]