David Chase, creator of The Sopranos, is returning to make a new HBO miniseries about the history of Hollywood filmmaking. From an article on NYTimes.com:

The series, Ribbon of Dreams, will begin with the behind-the-scenes roles played by two fictional characters – one a cowboy with some violence in his past, the other a mechanical engineer – who work for the famous early film director D. W. Griffith. It will follow them and their professional heirs through the development of the movie business.