This morning it was announced that there will be an Akumu-chan movie!
It's due for release in 2014. Filming has already begun, and should be completed in the middle of August. As of yet, there really isn't any info on the movie other than this...
In the comments from the cast on the movie OHP, GACKT wonders about what the ending will be for the relationship between his character, Shiki Takashi, and the lead character Mutoi Ayami. He's looking forward to working with the Akumu-chan team again. He also says that now he's turned 40, he's realised that it's even more important for children to chase their dreams and that it is the mission of adults to show the way. Through this movie, he wants to help people see that they can change their future and help dreams come true. He finishes by asking us to look forward to the movie's release.
Sources
Akumu-chan Movie OHPeiga.com Shiki-sensei!!!!! Please be all loved up and happy with Ayami XD
And 夢ovie? Mu-ovie? Bah.