i think getting those actors would be difficult. i would write the script after the actors have agreed to do it. if pacino, de niro, and garcia all agree to do it...then the plot should be like you said. i doubt pacino would do it, and i know garcia would. so michael will probably not be vincent's counselor....also getting to de niro to play an older vito....might be difficult. if he's not gotten....it's going to stricly follow sonny's life probably....him maybe having a small business (part of the family business...father gave it to him to test him).....thus he never has to see his father exept talk on the phone or though messages.