So its not something in Arcade Fire's immediate future, but other musicians are in the works of creating movie soundtracks. Ed Harcourt has just signed on for scoring duties for S. Darko, the supernatural sequel to Donnie Darko.
S. Darko takes place in 1995, seven years after the original and focuses on Donnie's younger sister, Samantha. In the film she deals with her brother's death and finds herself caught in the midst of a meteorite crash. Directed by Chris Fisher (Nightstalker), the film is slated for 2009 release.
On being a part of the project Harcourt commented, "I read the script and loved it, so I jumped at the opportunity, I'm really looking forward to experimenting and getting to do whatever I want. I have tons of ideas. This is all I'm thinking about - Darko on the brain."
In the meantime, Harcourt is currtently on tour, so make sure you go and see him live.