The Blu-ray has a short extra of McCarthy and Kiner discussing the music for the doc and their work on the various series. It's on the 2-disc special edition of the retail version and also on the Indiegogo donor disc. According to McCarthy, he wanted to use the DS9 theme in the doc, but the music now belongs to Sony and the licensing fee was too expensive. Interesting...
Yeah, I watched it today. Great documentary and nice to have the short interview with Dennis and Kevin. I wonder if the Sony licensing situation is the reason why La-La Land is not able to release scores from Paramount like Top Gun or Bumblebee at this time.