Website and Official Blog
Theaters and stores sold multiple promotional items and souvenirs for the film, from bookmarks to bronze statues. Some of these items can still be found on online auction sites such as Yahoo! Auctions and Mercari.
Website
This now-defunct website was home to all of the movie's trailers, general information, and interviews with the staff, cast, Hirohiko Araki, and potentially more. However, due to the way in which the website was constructed, the website itself cannot be accessed properly via the Wayback Machine.
However, some of its contents have been recovered - in particular, the interview with Hirohiko Araki, as well as interviews with Katsuyuki Konishi (Jonathan Joestar) and Hikaru Midorikawa (Dio Brando), and SOUL'd OUT, the musicians behind the film's theme song.
Official Blog
The film's website had an official blog that was used to convey information, show off some concept art, and inform readers about promotional material and the film's upcoming release.
Full translations are yet to be done.
Know the Movie Version
While this wasn't on the film's official website, Bandai hosted a tab on their own website titled "Know the Movie Version". Here, users could learn more about the film itself, as well as watch an interview with Hirohiko Araki and footage from the Joint Press Conference.
Both the interview and the Press Conference footage have been recovered.
