We always see something new each time we see th Godfather... thats the beauty of it (or at least one of the beauties). I see your point. I agree that whn Michael enters the mall after the "hospital thing" he is looking around and taking in the fact that there are buttonmen all over the place, and hearing that Sonny had taken out Bruno Tattaglia. Of course this is after the "I'm with you pop" scene, and it is a kind of prequel because I think he has already decided to join the family business. He seizes the oportunity at the moment Tom is successfully trying to convince Sonny to "wait."