About The Godfather movies, what would you ask them (assuming that Puzo were still alive)?

I'd have a tough decision to make.

I'd love to know more about the proposed Godfather 4 movie they were mulling over in the late 90's, but I would also love to find out who they thought pulled open the drapes in Michael's bedroom and what really happened to Clemenza ("that was no heart attack").

What questions would you ask?