The glorified series finale really just coasts along for a hundred minutes following a ton of characters you instantly want to see mowed down by a truck...
There's not much I can say about it, except it demonstrates a staggering lack of creativity -- it plays exactly like an extended episode from the later years of the show.
After a while, you expect a tale of the movie business to tell you something about the movies as well as the business, but Ellin and company have never had anything to say about that.