"They want us to pull Clooney out of the box," said Lindelof. "It's not gonna happen, guys."
The items included a blueprint of the "It's a Small World" ride, a doctored photo of Walt Disney with Amelia Earhart and a large silver disc that the pair said contained the remnants of an animated film.
"In 20 short years, we will share this extraordinary place with the entire world, so would you like to see it?" a booming narrator said at the end of the clip, which began with an animation of cave paintings and ended with a futuristic cityscape.
Despite the plethora of stars and footage, the Force was notably absent from the D23 Expo, despite the Walt Disney Co. acquiring George Lucas' Lucasfilm empire last year. Disney didn't tease anything new about its plans for "Star Wars" films at D23. The studio previously said it plans to unleash a new "Star Wars" trilogy and two spin-off films beginning in 2015 with "Star Wars: Episode VII."
"I really wish I could tell you more, but there are dark forces and they are watching," said Disney Studios chairman Alan Horn.
Saturday's presentation concluded with several clips from "Saving Mr. Banks," which tells the story of Walt Disney's collaboration with "Mary Poppins" author P. L. Travers, and a performance of "Go Fly a Kite" from B.J. Novak and Jason Schwartzman, who portray "Mary Poppins" songwriters Richard and Robert Sherman in the film. The pair were joined on stage by the real-life Richard Sherman.
Patterned after San Diego's wildly popular Comic-Con, the biannual D23 Expo, which Disney launched in 2009, isn't just about movies. On the show floor this weekend, the 45,000 expected attendees are snapping up exclusive merchandise, trading collectible pins and meeting stars from Disney Channel shows.
Follow AP Entertainment Writer Derrik J. Lang on Twitter at http://www.twitter.com/derrikjlang