James Cameron made a surprise appearance at this weekend?s CinemaCon in Las Vegas at the end of the Fox presentation to announce that Avatar is now planned as a five-film series. ?I?ve been working the last couple of years with a team of four top screenwriters to design the world of Avatar going forward: the characters, the creatures, the environment, the new cultures,? Cameron said. ?So far, the art I?m seeing, is in pure imagination, really far beyond the first film.?