Sybling Rivalry Poster Sybling Rivalry Amazon » eBay » The film "Sybling Rivalry" is a 7 minute horror comedy from 2011.. Sybling Rivalry Details Title: Sybling RivalryYear: 2011Genres: Horror, comedyDuration: 7m Rate this title Have you seen Sybling Rivalry? Rate it between 1 to 10 below. Log in to your account if you want to rate this title.