If you like dark heresy or THE 40k universe in general you might, j ust might , like a cheap little movie called 'mutant chronicles ' which is based on a game with a bit of a 40k theme.

It's a dark, war torn future with humanity under assault from demonic like monsters. Very Gothic and steam punk feel with lots of darkness. It has some acting talent like Thomas Jane, ron perlman and john malkovich.

It's a very cheaply made movie but I think if you like. 40k you might like it. It could almost be like a mission in dark heresy. One character is a monk\priest.

http://www.imdb.com/title/tt0490181/

It was a very interesting movie.. and don't forget had what could have a Sister = Severian