Wow, seems I may have this topic all to myself. I just about have a volume 3 of year 5 ready. Should be completed this weekend and available in the beginning of the week. Here is what it is looking like so far:

Main Features:
-G4TV Exclusive inside look at the Order of the Phoenix
-Harry Potter - The Costume Drama
-MTV’s Order of the Phoenix: Making The Movie

Bonus Featurettes:
-Ebert & Roeper Review
-HP World highlights
-Extras feat. Daniel Radcliffe

There is a bit more room on the disc, so there may be some other things.

I really need help with some decent quality material for the first 4 books/films. The stuff I am able to scrape up is mostly pretty crappy quality. So I would like to add a little bump out there for anyone who might have some stuff or know of some good things to look for.