Now that a schedule for the premiere of "Avatar 2" has finally been set, Sigourney Weaver doubts if the movie can be released in 2018 considering the pace that the film's production is currently taking.

"Avatar" had its first movie premiere back in 2009 and featured the amazing world of Pandora where the Na'vi tribe resides. The movie is set in 2154 when the Earth is in the midst of an immense energy crisis and the only solution to it is the mineral called unobtanium. The Resources Development Administration (RDA) uses avatars or Na'vi-human hybrids like Jake Sully (Sam Worthington) to explore Pandora for more unobtanium reserves.

Weaver plays the head of RDA's Avatar Program named Dr. Grace Augustine. She later on helps Jake and the Na'vi to defeat the RDA and their army to stop them from driving away the tribe from their natural habitat.

During the New York premiere of "A Monster Calls" where Weaver is also a cast member, the award-winning actress was quoted by The Hollywood Reporter as she commented on the 2018 release: "We haven't started it [filming "Avatar 2"], so I don't know how realistic that date is, but I think it's going to be very exciting. I've read three of the four [sequel's scripts] and they're even more extraordinary than the first one."

It can be recalled that late last month, it has been revealed that an untitled Fox and Lightstorm Film was given a premiere schedule of Dec. 21, 2018. The clues seem to suggest that the untitled film is no less than "Avatar 2" since Lightstorm was the studio that led the first "Avatar" movie's production while Fox was the distributor.

However, it is also important to note that Stephen Lang has earlier revealed during the Wizard World Comic Con Chicago last August that: "As the New Year turns, we start to shoot for the Avatar sequels. I think that the whole process of making the films and opening the films will go to about 2023."

To date, "Avatar" director James Cameron is yet to confirm the schedule of "Avatar 2's" filming.