found on http://blog.hemmings.com/index.php/2012/07/19/coming-soon-the-other-dark-knight-film/
Next month, Buick performance enthusiasts will get a sneak peak at a documentary film that shines the spotlight on the hottest car to roll out of Flint in the last 25 years when the first 20 minutes of Black Air: The Buick Grand National Documentary will be shown at the Buick Performance Group Nationals on August 4 at the National Trail Raceway in Hebron, OH. The film is scheduled to be released in early December.
Filmmaker Andrew Filippone Jr. has spent four years tracking down Buick GN and GNX owners, racers and collectors, as well as members of the media who road tested the cars, plus the key players responsible for engineering, styling and marketing at Buick and General Motors.
In the documentary, Filippone said he attempted to explore new territory (for a car film), delving into issues of culture, social class, inheritance, and privilege as it related to the turbocharged V-6 Buicks, and away from the usual focus on mechanics and performance.