Shueisha's Weekly Shonen Jump magazine teases the film's story, which takes place six months after the end of the manga:
In the past Yūgi Yami and Kaiba have clashed many times!! Yami Yūgi, who resides in Yūgi Mutō's body, and Kaiba will have a duel that bets their prides and accepts each other's mutual experience.
Shunsuke Kazama will return to voice Yūgi Mutō, and Kenjiro Tsuda will return to voice Seto Kaiba as the stars of the film.

[url]http://animenewsnetwork.com/news/2015-07-11/yu-gi-oh-the-dark-side-of-dimensions-film-slated-for-next-spring-in-japan-late-2016-internationally/.90355[/url]

I also read EU/US comics and am a librarian.
Manga-Masters, My ANN-Lists + Imdb

I am pretty excited for the movie, even though I never read all of the manga.

As of December 31st, 2021, this is inactive. I have long moved on. Goodbye.