It's unclear, although it's certain that Willie was to have been in GF 3. At one point in the script he had a large part, but Joe Spinell, the actor who played him passed away in 1989 while FFC and Puzo were working on the script. He was ultimately replaced by Joe Mantegna's Joey Zasa.
"I got news for you. If it wasn't for the toilet, there would be no books." --- George Costanza.
