By Jennifer Armstrong
Updated October 20, 2010 at 02:05 PM EDT

James Cameron discussed his plans for two Avatar sequels at an event to promote the Nov. 16 release of the blockbuster on Blu-ray, reports. The director told reporters he intends to shoot the second and third Avatar movies back-to-back as one long production, then release them a year apart. “In order to do that, we have to refine our technical processes beyond the end of where we were finishing Avatar one a year ago,” he said. “We need to future-proof ourselves out five or six years to the end of the third film.” He added that Sigourney Weaver could easily return for the sequels despite her (seeming) death in the first movie: “Who said she died?” Cameron said. “Nobody dies in a science fiction movie. Whether Grace lives or dies depends more on Sigourney’s agent than anything.”