Sorry if this has been covered, but: Have any of you watched the Godfather III trailer on the GF bonus DVD? It's full of early footage from the original filming! Most of it is footage we either haven't seen, or scenes that are different to how we know them; it's like a trailer to a film we don't know. For example, Vincent spitting before Altobello, telling him "I'm a Corleone!" And Connie saying "With my help you can save the Corleones" sounds a lot cooler than her "DOO IT!". Watch it, it's pretty interesting.
Just make sure you don't watch the trailers to GF1 and 2. Especially 1, it's just a collection of images.