Didn't Puzo work with FFC on Part III? FFC is adimant in saying he'll never do a part IV because Puzo is dead. That would kinda mean that Puzo worked on Part III.

I know he did. He's given credit on the movie credits.

As for part IV, I would like to see a golden age movie, hopefully like what the new book will be about.

But I can't say I am against any more films. I'd love a chance to go back to the world again. I just hope they'll be done well.