Of course there won't be an Oscar in it for them, but that's what independent film festivals like Sundance are for ;-)
As I said, of course, there are bigger productions out there, but not in video games. And I don't really want 2PP to turn the doc into a 2 hour movie or something. The 10+ hours the thing is going to have is the way to go here. But that's what sets it apart from "Indi Game: The Movie": It's covering the production of the whole game extensively, without leaving out stuff that would be cut for a shorter movie. But that's what I mean by "massive"... the end result will be huge, even if the production is relatively light.