"You Build Little Worlds, Little Stories, Little Shells Around Your Minds, and That Keeps Infinity at Bay": Showrunners: A Documentary Trailer
A documentary is in the works exploring exactly that phenomenon of showrunners, and is astonishingly titled: Showrunners: A Documentary. The working title was Fox is Dead to Me according to nonexistent sources in my head.
The trailer is below, which features exactly what you would want. Lots of conversations with people who are the rock stars in their own little niche world:
I think Joss Whedon should just carry Captain America's shield with him everywhere he goes from now on. The film is short of budget to finish things up, so they've started a Kickstarter page to raise the last funds. They should have just called up Pom.