Christmas is coming early for those who love spending the holidays with the Stone family. Thomas Bezucha, the writer-director behind the 2005 perennial yuletide favorite “ The Family Stone ,” is working on a sequel to the movie, he tells CNN. Bezucha shared the news during an interview about working with the late Diane Keaton, who played matriarch Sybil Stone in the original movie. The filmmaker said that he had been thinking about and working on the script for a followup to “The Family Stone” –