So I just saw the movie, and it's such a let down.
If you plan on watching it, I would suggest you wait (yeah, a bit longer) for the second movie to be subbed and released (probably in July? August?), because this movie really doesn't stand by itself.
Also, for some reason the English at the beginning of the film seems to be worse than in the anime, but I'm not sure why this is bugging me more than some of the other things in there. The movie basically took everything I liked about the anime and got rid of it.
I really hope groups such as Frostii do it, even though the movies are already licensed. I would imagine that copyright law enforcement would be stricter on films than on anime, although I'm not sure why I have this idea in my head. I wouldn't know anyway since I usually don't watch movies.