But they didn't provide any more information about the mystery project, which left some people wondering what exactly this film would be about.

STORY: Britt Robertson Lands Key Role in George Clooney's 'Tomorrowland'

On Monday, Disney announced that Tomorrowland is beginning principal photography in Vancouver, and finally provided a more in-depth plot synopsis for all those people wondering what the story would be.

It reads: "Bound by a shared destiny, a bright, optimistic teen bursting with scientific curiosity and a former boy-genius inventor jaded by disillusionment embark on a danger-filled mission to unearth the secrets of an enigmatic place somewhere in time and space that exists in their collective memory as 'Tomorrowland.' "

The film stars George Clooney, Hugh Laurie, Britt Robertson, Raffey Cassidy and Thomas Robinson. Bird will direct and produce, and he co-wrote the script with Lindelof (also a producer) based on a story by Bird, Lindelof and Jeff Jensen. Jeffrey Chernov is also producing.

Jensen and John Walker will executive produce with Bernard Bellew and Tom Peitzman co-producing.

Disney's mysterious Tomorrowland will open in theaters Dec. 12, 2014.

E-mail: Rebecca.Ford@THR.com

Twitter: @Beccamford