After scoring interviews with Billy Joel, Joe Walsh, Earth Wind & Fire and others when they were in town for concerts, Brown says they have about 60 to 75 percent of the documentary filmed. They also have dozens of hours of historical footage, about 10,000 photos, studio documents and unheard music to work with.
"I think it's one of the last great untold stories," Brown says. "People wouldn't want to see another Woodstock documentary, I don't think."
Here's the trailer for the film: