I Am Number Four is a teen-aimed science fiction film based off of the young-adult novel of the same name by Pittacus Lore (really Stephen Frey and Jobie Hughes). Off of that trailer alone, I would undoubtedly want to see the film.
There’s always a but when it comes to marketing a non-cookie-cutter film, isn’t there? After the initial trailer (almost instantly), a new set of trailers came out, focusing on the romance aspect of the story.