This document discusses different types of source material that films can be based on, including books, comic books, historical events, true stories, original stories, remakes, video games, television shows, and documentaries. It provides brief descriptions and examples for each type. For books, it notes that adaptations attempt to appeal to existing audiences or tap into new authors. For superhero films, it describes their focus on super-powered characters protecting the public. Regarding video games, it explains their reputation but also examples of financially successful adaptations. TV adaptations expand plotlines or production values relative to the show's format. Remakes make significant changes while keeping the overall story, and reimaginings take greater creative liberties with the source material