http://www.etonline.com/movies/120643_Martin_Scorsese_Talks_Sinatra_Hennessy/
ETonline: There's also been talk of you directing a Sinatra biopic -- any truth to that?
Scorsese: Oh very much. I'm talking to one or two writers now. The problem is the biography. Where do you start? Hugo took up so much time that I now have to settle in. I met this writer who I think could do a lot with it, but [we] have to get a hold of the story. It's too unwieldy. I'd love to tell the whole story, but the idea of art is to figure out where to start because we can't tell his whole life story. If we told the whole story of Sinatra, it would be 15 hours – then you've got something like a miniseries, along the lines of Boardwalk Empire.
ETonline: Is that a possibility?
Scorsese: Yes. That's the other thing. I love the idea of a miniseries – particularly working with HBO because as long as you stay reasonably on budget, you have freedom which is very difficult to find in the cinematic marketplace. It's something I find challenging and love trying at.