There were many differences between the original Godfather 2 and the movie version, including: 1. Plot: In the original novel, Fred betrayed his family and left the family. There is no such plot in the movie version. 2. Character development: In the original novel, Kai left his family and went to the United States to pursue his musical dream. However, there was no such plot in the movie version. Kai stayed in Italy and kept in touch with his family. 3. Character relationships: The interpersonal relationships between the family members in the original book are more complicated, including the conflict between Fred and Tom and their relationships with others. The movie version, on the other hand, focused more on the internal struggles of the family. As for whether the original work of Godfather 3 would continue the plot of the movie, the answer was no. The original novel didn't have Fred betraying his family or Kai leaving home, and the plot of Godfather 3 was completely different from the movie version. The main character in the original novel was the godfather, Vito Vigano, who told the story of his life and work in Italy and America, as well as his struggles with his family members.