I estimated somewhere between 10 to 20 minutes of extra material. What was annoying is I found out is that there is about 30 minutes of extra credits at the end. Even though it is good to see an extended edition this was a big let down. This final cut is, in fact shorter then the third movie, (which had me confused); when you remove the needless extra 30 minutes of credits. Why the extra cuts? Was this done in order to have this extended version to make money with the 4 disc box set? The extra 30 minutes of credits could easily been added to one of the discs of the box sets. In the end these cut could have been in the original cinema release or extras as deleted scenes.