‘Firefly’ star Nathan Fillion says he’s planning a new animated version of the cult sci-fi series

By Lianne Kolirin, CNN (CNN) — Fans of cult sci-fi series “Firefly” are celebrating after star Nathan Fillion revealed that the show may be returning — in an animated format. The series, created by Joss Whedon, of “Buffy the Vampire Slayer” and “Avengers Assemble” fame, has a legion of fans despite the fact that it