From the Disney Parks Blog (August 12, 2013):
During a gathering of Disney fans at D23 Expo on August 10, Walt Disney Parks and Resorts Chairman Tom Staggs premiered a trailer from an upcoming movie that explores the past, present and future of Walt Disney Imagineering by noted documentary filmmaker Leslie Iwerks. Ms. Iwerks comes from a family with deep Disney history — her grandfather was an early Disney animator and her father [Iwerks Entertainment co-founder Don Iwerks] is a former Imagineer — and her previous work includes profiles of Pixar Animation Studios and visual effects house Industrial Light & Magic.
Walt Disney Parks and Resorts is partnering with Leslie on this latest project that will explore in unprecedented depth the facts, faces and fantastic stories behind the magic of Disney Parks. The film is due for release in 2016.