If you go to the following link you will see the new Harry Potter film that's in the pipe works entitled "Harry Potter and The Hangover" =Phttp://www.xbox.com/en-GB/live/bestoflive/connectnow.htm
Just below the big avatar on the left hand side. Page reads "*Gold membership required for some services. Harry Potter and The Hangover available from 7 December"
Yes I do know these are 2 separate films. =P