James Cameron sits down with ET’s Denny Directo to discuss his new film, ‘Avatar: Fire and Ash,’ which hits theaters on Dec. 19. The Oscar-winning director moved to New Zealand to make these films, but explains why the true challenges were all with the script, not technology. He also reflects on his decades-long relationship with producing partner Jon Landau, who died in 2024, and explains why he hoped Miley Cyrus’s theme for the film, ‘Dream as One,’ wouldn’t be very good.