There's a new documentary about Pete and Jack Herschend, Pete and Jack Tell It All. It was shown Monday night at the IMAX. Unfortunately, no other screenings are planned at this time. More details about the film in this article from Branson Tri-Lakes:
http://bransontrilakesnews.com/news/article_233765ee-df79-11e7-9235-6b2d73b3e77b.html