I suppose the headline that everyone, including me, has been waiting for is that the Salinger trust is preparing to release a great deal of substantial, important fiction he finished before his death in 2010, but chose not to release. (The last piece Salinger published was in 1965.) This is a little like saying Moby Dick has been sighted in a large local swimming pool.
There is much more to this documentary than that, however. I do hope it wins an Emmy.