It had a very original mythology, though; I'm not sure how much of that is Russian vs western, and how much of it was made up by the guy who wrote the book it's based on. Excellent special effects, lots of cool cinematography, interesting story, etc. And it doesn't tell you everything up front, which I always enjoy. In combination with it being in Russian, I did get a little lost here and there, but that's okay. Better lost than spoon-fed.
The boys picked up the import DVD; we watched it on Kuma's new laptop, and it's a good thing he took Russian in highschool, because all the menus were in Russian, too! It's coming to the U.S., and I hope it does well at the box office, because it's the first movie in a trilogy. I'm looking forward to the next two.