I think there is alot of things that might've happened differently in GFIII had the Tom Hagen character been available.

It also would've probably been a far better movie.

Sofia Coppola I could've handled. But unfortunately, it took the absence of Robert Duvall in the GFIII cast, and to add insult to injury replace him with a manequin B-level actor - to prove how crucial a role Duvall had played in the trilogy.

Apple