The document discusses different subgenres of horror films that the author is considering for a film trailer project. It examines the key characteristics and conventions of religious/satanic films, which focus on possession and exorcism; supernatural films, which involve ghostly happenings and haunted locations turning family members against each other; slasher films, which center around a psychologically disturbed killer and contain graphic violence and gore; and found footage films, which are presented as uncovered video camera footage documenting an unknown disturbance. The author analyzes examples and defining elements of each subgenre to determine which one to pursue for the trailer.