Almost all of the master tapes, cells, and original drawings were reportedly destroyed shortly after the film was released. You can find a full copy of it on pirated tapes of Bambi 2002.
The Latin American cut has only one known film reel to have survived, it resides in a museum in Santiago, in a room unavaiable to the public. It's screened only once a decade and you have to pay an exorbitant fee to see it.
The only DVD release thus far is a 20th anniversary edition for the Japanese dub in 2010 (which, ironically, also contains a new dub). It exists because the anime versions of The Diary of Anne Frank are very popular in Japan, which has very few Jews and hence very little cultural sensitivity to what happened during the Holocaust.
Misaimed Fandom: A noticeably large portion of this film's cult followers is made up of Neo-Nazis and other equally-minded individuals (forobviousreasons), even though the director himself said that he didn't intend to outright lionise the Nazis, but to 'disarm' some of their more disturbing deeds so it wouldn't scare children in the audience.
Old Shame: If you talk to any of the actors mentioned on this page, as well as anyone who worked at Disney in the late 1980's, they will totally act like this movie never actually existed and that they don't know what you're talking about. Go on, try it!
Originally, Olga's dog was not named. It wasn't until some of the actors nicknamed it "Mr. Goebbels" was it put in the script.
What Could Have Been: There were some reports of adding an attraction based on this movie to Disney World; namely the German Pavillion of EPCOT was to have added an Auschwitz-related attraction. The reports did not have any details on what exactly the attraction would consist of other than it would be "designed to be entertaining, but educational at the same time". However, before more details could be discerned, the severe backlash from the movie resulted in the project never being mentioned again.
Pete Townshend was considered for composing the film's score, but he backed out because he was too busy recording The Iron Man. It makes you wonder how it would've turned out.
Relics of the battle's concept can still be seen in the fight against the Belief boss in Bayonetta 2, however.
Disney, prior to the film's release, developed a plan for a sequel that would focus on Anne's fictional daughter Anya as she searches for her lost younger brother Claus in Cold War-era Berlin, while Stalin's right-hand man Colonel Polov Vlagavich tries to catch her. However, due to the severely disappointing reaction to the film by critics and audience members, production was quickly ended and the animated sequences that were completed were retrofitted into other Disney works.
However one solitary piece of the storyboard exists to this day, in the lobby chandelier of Disney's Art Of Animation Hotel in the Walt Disney World Resort hotel. It's hard to see, and most people assume it's from The Little Mermaid.
There are, however, plans by a group of internet animators, musicians, and voice actors to make an unofficial fan production.
The Inspector Javertfan club has expressed outrage at the plot line, because Colonel Vlagavich would be an example of the trope Inspector Javert, and they don't want their hero to be vilified by connection.
There was some talk of the film being brought into the Kingdom Hearts saga. There was even a planned scene of Mickey Mouse himself fighting through a wave of Nazis all on his own and friggin' killing Hitler! (who's evil was so strong he could control the Heartless) Sadly, this idea was scrapped.