The document discusses elements to include in planning a thriller genre film trailer. It recommends using ordinary-looking protagonists to make the story more relatable to audiences. Both obscure and familiar locations should be featured to establish themes. Duller color schemes with bursts of vibrant colors can build suspense. Warm colors should be used initially to portray the protagonist's innocence before transitioning to darker tones. The document also includes early story ideas, such as using song lyrics to foreshadow murders or showing flashbacks of why the protagonist seeks revenge.