Superman Doomsday is a fan made sequel to Superman Returns. Like the comic book tale from the 90's and animated feature from 2007, it tells the story of Superman's epic battle with Doomsday, and subsequent death. However it differs in that it also serves as an impetus for the formation of the Justice League. What separates this from other fan films is the medium employed to tell the story. Short in length and minimal in dialogue, it uses clips from existing films in a mash-up style, which are then edited in Adobe After Effects to give it a unique viewing experience.