This document discusses several theories related to narrative, genre, representation, audience, and media language that could be applied to analyzing movie trailers. It summarizes each theory and provides an example of how the theory could partly or fully apply to teaser trailers. Some of the main theories discussed include Barthes' narrative theory, Todorov's stages of narrative, Propp's character types, Neale's genre theory, Mulvey's male gaze, and Saussure's semiotics.