Martin Scorsese is quoted in the national newspaper of India that he would like Al Pacino to play Frank Sinatra and Robert De Niro as Dean Martin for at least one segment of the film. 

 “[I’ve] yet to spot the actor who can bring back Frank Sinatra alive on screen. My choice is Al Pacino, and Robert De Niro as Dean Martin.”

I wonder if the movie will be shot in 3D.