" A marketing hook, as opposed to a logline, is anything that entices an audience into a theater. In Transformers, Toy Story, and G.I. Joe, the marketing hooks were the toys themselves. In Spider-Man and Iron Man, the marketing hooks were the familiarity many moviegoers would have with the comic books. The marketing hook for West Side Story could be “A modern day Romeo and Juliet set among the gangs of New York.” Sometimes a marketing hook puts together two successful elements, so if you did a film about a predatory lion in Africa that kills people, you might say it’s “Jaws meets Out of Africa. "

― Linda Seger , Making a Good Script Great