I guess you guys don't like to read semi-long posts but read this thread I made:

http://www.thegodfathertrilogy.net/ubb/ultimatebb.php?ubb=get_topic;f=12;t=000130

It links to an article about a pre-written GF4 that Puzo and Copolla worked on before Puzo died.

GF4 would be a prequel taking place in the 1920's following Sonny Corleone since it was Puzo's fav. character.

"There's too much money in it to resist."

-Don Falcone of Los Angeles on the Topic of Drugs at the meeting of the Five Families organized by Don Corleone.