The Harry Potter Wizard's Collection, a 31-disc box set including all eight Harry Potter films and over four hours of unseen footage, is scheduled for release in September in the U.S. (the 7th) and U.K. (the 10th).
Yahoo! Movies has a clip from some of the bonus material. This one features a young Rupert Grint talking about an "unpretty picture" he drew of Alan Rickman (Prof. Snape) during filming of the first film. The clip then flashes forward to present-day, and we find out exactly what Alan Rickman did with that picture….