What was JK Rowling referring to during the Prisoner of Azkaban DVD commentary?
UPDATE: Seems to be a duplicate of " What was JK Rowling referring to during the Prisoner of Azkaban DVD commentary? " - please vote to close!
As per "Prisoner of Azkaban DVD Extra" ( Quoted at http://www.accio-quote.org/articles/list2004.html)
Cuaron "put things in the [PoA] film that, without knowing it, foreshadow things that are going to happen in the final two books."
I'm assuming that this means things which were NOT in PoA book.
If this is correct, does anyone know what those movie-specific foreshadowings in PoA were?