Science fiction fandom other groups including LGBT communities, libertarians, neo-pagans, and space activist groups like the L5 Society, among many others. Some groups exist almost entirely within fandom but are distinct and cohesive subcultures in their own rights, such as filkers, costumers, and convention runners (sometimes called "SMOFs"). Fandom encompasses subsets of fans that are principally interested in a single writer or subgenre, such as Tolkien fandom, and ("Trekkies"). Even short-lived television series may have dedicated followings, such as the fans of Joss Whedon's "Firefly" television series and movie "Serenity", known as Browncoats. Participation in science fiction fandom often overlaps with other similar
Joss Whedon released in November 2017. On October 20, 2016, Whedon revealed that he is currently writing a new project that is a historical fiction/horror film set during World War II. On July 13, 2018, HBO obtained the rights to "The Nevers", a "sci-fi epic about a gang of Victorian women who find themselves with unusual abilities, relentless enemies, and a mission that might change the world", on which Whedon will serve as writer, director, executive producer, and showrunner. Early in his career, Whedon sold two spec scripts that were not produced, "Suspension" and "Afterlife". He sold "Suspension" for $750,000, with an