2. Fight Club
Fight Club is one of the greatest films ever made, and though the ending is a superb stinger, one can't help but think a TV show continuation would at least be extremely interesting. Titled "Mayhem", the show would be about Project Mayhem's various exploits to cause anarchy and upset the established order; Tyler Durden and Jack wouldn't even really need to be shown, given how it's clearly explained in the film how numerous cells of the organisation are capable of operating completely free of central command. We could follow one of the high-up lieutenants who commands his own branch, with references being made to Tyler Durden throughout. Of course, the presences of Pitt and Norton would be sorely missed, so there's always the possibility for them to cameo, especially given the novel's original ending that did not figure in the film, which featured the protagonist in an insane asylum.