Here's a thought. Everyone knows Tom Hagen was a lawyer. He was also made consigliere. What if Anthony quits his singing career, and goes back to law school? Maybe act as the family attorney like Tom was. MAYBE even after that... consigliere? Thats just one of my theories.

My next one is this. What if Michael became consigliere to Vincent? Just like Vito was to Michael when he made him Don. Because honestly I dont think that Michael will ever be out of the family business. He even states in Part III... "Just when I thought I was out, they pull me back in."