This is supported by the fact that Coppola wrote a part for Rocco in Part III in which Rocco was still a member of the Corleone family and had only been wounded in the airport.
Well even though the final cut may be all that counts, if its true FFC had Rocco in the 3rd movie then I have officially forgotten about the possibility of the Roth hit being a suicide mission.
I need to track down some of these infamous alternative scripts that everyone is so keen on referencing in here.
