This is a question for everyone. How different would The Godfather 3 have been if Duvall had been in it? Would it have improved it to the point where it would be held in the same regard as the first two movies? We will never know but it’s fun to speculate about how different the plot would be.
I'm a big fan of continuity in sequels. That's why I like The Trilogy and Star Wars.
I am not as negative about III as some Board members are. However, Duvall's presence in it would have made me feel a little more comfortable with it. Some of the negative comments about III are not out of line and I can agree with them. Thus, Duvall's presence could have mitigated my attitude toward III which isn't that bad to begin with.
As far as the plot goes, maybe FFC would have altered it with Duvall in it and produced a better product.
"Generosity. That was my first mistake." "Experience must be our only guide; reason may mislead us." "Instagram is Twitter for people who can't read."
