If they are to successfully write/film GF4 it must include the same formula as the rest. I particularly do not care for Garcia but his character is set in stone. Pacino is a must. The brilliant ending of GF3(and indeed it was brilliant!) left us thinking that Michael was dead and alone with an entire empire dying with him. However, perhaps he is alive. Perhaps the true enemy of the Corleone Cosca was a true mystery, a man who was from the past, a man whose greatness and relentless loyalty to Turi Giuliano borders on lust... Aspanu Pisciotta (now we bring De Niro back into the fold). Fictionally, we could say that Vito Andolini indeed had a brother who was estranged and born out of wedlock, a mafia pezzonovante had raped Vito's mother and she bore the child named Archangelo Pisciotta. Archangelo's second son was Aspanu. The resemblance to Vito (De Niro's first character) can now be explained. In the book The Sicilian, Michael is sent to Sicily to bring back Giuliano, however, this real life hero's fate was already sealed by the Corleone as revenge for the rape of Vito's mother. Michael has no knowledge of the situation and now the revenge was turned to Michael's daughter by Aspanu to avenge for the slaughter/setup of Turi. Now the saga of GF4 can begin. "revenge is a dish best served when cold...."