Blu-ray. For those that have not seen the series, it may not work as a stand alone film. For those who do have a working knowledge of the series, you'll be able to jump right in. The film, based on a light novel by Nagaru Tanigawa, finds everyone except Kyon forgetting the existence of Haruhi and the SOS Brigade. Can Kyon figure out why or who changed reality and put things right?
Check out this awesome fan made trailer- "The Inception of Haruhi Suzumiya"