I think you're skipping a few steps...

there has been something announced of somewhat a bookwise new episode to the Corleone-family stories....in a month or so the story outline and the writer will maybe be announced...

the only thing said about a movie is that "Paramount holds the rights"

you're drawing conclusions that might not even occur....

at least not for the next 2 or 3 years, the soonest a possible movie (bad idea, I agree) would be released is 2005 or 2006, I guess...