When Fox set a Winter 2018 release date aside for an unannounced James Cameron film, most of us assumed that would be for "Avatar 2," the hotly anticipated sequel to the highest-grossing film of all time. Well, according to star Sigourney Weaver, that release date is extremely unlikely, as the film has yet to even begin production.

RELATED: Sigourney Weaver Calls Avatar Sequels ‘More Amazing’ Than The Original

"We haven't started it, so I don't know how realistic that date is, but I think it's going to be very exciting," Weaver told The Hollywood Reporter while promoting her movie "A Monster Calls." "I've read three of the four [sequel's scripts,] and they're even more extraordinary than the first one."

Weaver previously indicated similar sentiment, expressing that the three sequels' scripts are "many times more amazing than the first one," and noted that the original did the "heavy lifting," in terms of establishing the scope of the universe.

Cameron has said the Broadway take on "Avatar," "Toruk," thematically falls in line with the direction of the sequels -- though noted that they're not directly connected to the films. “The storyline in the sequels really follows Jake and Neytiri and their children...It’s more of a family saga about the struggle with the humans. But thematically, ‘Toruk’ manages to land very very closely to the feeling of where the sequel stories are going.”

RELATED: James Cameron Teases Avatar Sequels Are ‘a Family Saga’

It seems we'll have to wait a little while longer before we know when "Avatar 2" hits screens, let alone its two follow-up films...