A Forgotten Trope, except among fans of movie serials. This refers to the practice of editing a Film Serial into a single movie. Generally disowned both by fans of movies and of serials, since a lot of material has to be removed. Compilation Movie is a modern relative. Fixup Novel is the literary equivalent. No examples necessary, since it's not hard to find full lists on the Internet and any list of examples would just be copied from one of them.