I'm interested to see what Part II had to cut out, as he said regarding the time limitations. There hasn't been much in Part I about Dumbledore's past except the cryptic statement at Bill and Fleur's wedding by Aunt What's-Her-Name that Dumbledore's father killed "those three Muggles". Will the film elaborate on that? How much will Aberforth be used? Things to make you go hmmm...