I remember when Das Boot came to America. Man, I didnt even know it was filmed and it was showing at a famous theatre downtown. I couldnt believe it. (I had read the book years before when it was on the New York Best Seller List and couldnt get it out of my mind). The film was in english subtitles, still in original german language. About a year or two later, it was hitting theatres more and more, and now it has a cult following and can be found in probably 3 versions at Walmart often, including the directors cut version.
So I think this movie, if its as good as it appears to be, will have nothing to worry about. If its good, they will come to it. Just a matter of time.
Bill