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's unrealized projects on Newt and a resurrected Ellen Ripley. Many directors were considered to direct it, like Danny Boyle, Bryan Singer and Peter Jackson. At the end, director Jean-Pierre Jeunet, who directed "", was hired to direct the film. However, Jeunet made many comical changes to Whedon's script, and Sigourney Weaver disliked it, so the film's development was cancelled. In 2004, Joss Whedon set plans for a "Spike" movie. The film, if ever greenlit, would star James Marsters, Alyson Hannigan and Amy Acker. At a convention, Acker stated the film was not going ahead due to money issues. After the release of