From the D23 YouTube channel:
In this very special episode of Disney Geek, Steven Clark, head of D23, gives a sneak peek at what’s coming to D23 Presents Treasures of The Walt Disney Archives at the The Ronald Reagan Presidential Library & Museum—at 12,000 square feet the the largest exhibition ever curated by the Walt Disney Archives. From Oswald the Lucky Rabbit and Mickey Mouse to Captain Jack Sparrow and Captain America, the exhibition features more than 500 artifacts, at least half of which have never been seen by the public—including models, props, costumes, set pieces, and artwork from throughout Disney history.
http://www.youtube.com/watch?v=fyQIuY4ffVk