A new movie is coming out in Germany in Spetember of this year, it is called 'Der Untergang', or 'The Downfall': http://www.german-cinema.de/archive/film_view.php?film_id=1034 Trailor: http://www.de.cineman.ch/movie/trailer/6044/trailerhigh1.mov
I imagine it would be extremly depressing, I would be more interested in how the downfall affected the people of Germany the reminance of the Army, and the high command, ordinary citizens, who tried to flee to the west, how did people fair in East Prussia that kind of thing. I don't think it will be that enlightening, I could be wrong!