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Originally posted by TonyD:
That might be the earliest that any such plan is discussed.
It probably was, good thinking TonyD!!!!

before that, Michael wouldn't even consider these kind of options, not wanting to have any to do with his fathers business....after Vito got shot, something changed inside of Michael, resulting in all greatness the Godfather novel/movie(s) provided us. The scene you're referring to might as well be a first indication of it all...