When we're deciding what movie we want to go to, we look at the names behind the productions, ask our friends for their opinions, and, of course, watch the official trailers. In fact, the latter influences the decision three times more than any other source.
However, what you see is not always what you get. Recently, in a post on the subreddit r/movies, Redditor u/sonofwelk asked cinephiles to name the films that they think turned out to be completely different from their trailers, and people shared a lot of interesting examples, reminding us to stay wary of marketing when purchasing our next ticket.