Cicci definitely was going to be in Part III. He is in either the Death of Michael Corleone script or the original Part III script that had Hagen in it too. I read it...it's on line somewhere. I can't remember if they even allude to the committee hearing though, which made it an easy switch to someone else like Zasa.

I don't know how they would have made that plausible but I don't think FFC and Puzo were working on Part II levels of decision making mastery at that time.