The GFIV general idea:

My script is this: Sonny's time would be Ricardo's outline(nobody can go avgainst it ).

The Vincent saga would take place from 1984 to 1997.

Vincent Corleone is the head of the most powerful organization in America. Gambling, horsetracks and some bordellos operated by a semi-renegade capo named Antonio DiNardesi. DiNardesi had been operating with drugs and had traded with the dreaded invading cartels that are gaining control over the Sicilians. The Russians, Mexicans, Japanese and Colombians had been fighting for the control.
Is 1984, Vincent is celebrating the baptism of his son, Vittorio Corleone, in St. Patrick's cathedral. Friends and relatives are asking favors to the Don, who had straightned out after Mary's death. He married Charlotte Andania(Sicilian father and American m other) a year ago. She's a beautiful woman, an activist. His father is a powerful movie producer of Holywood.
Vincent is having a good day, but his Underboss, sixty-nine years old, Albert "Al the Lion"(Familiar? ) Neri had given him bad news: DiNardesi had left the family and with Crocefisso Barzini, head of the Barzinis, who had made an alliance with a Sicilian middleman who has a proposition from the invading cartels.
Vincent is mad as hell, but calms down. Neri informs him, that Vincent's half brother, Santino Jr., had ask him a request. Santino wants to be a member of the organization. This is nothing new to Vincent: Sonny had been make his reputation as a shooter.

Darts. Lunch's over. Gotta go. I will continue tommorow.