Im sure someone will leak it online within a week or sooner, but it'll be VERY bad quality and it will not be subbed. It will be recorded with a camera in the theater, and it will be in raw japanese audio. Not even worth it in my opinion.
The word is Australia [I think its Australia at least] will also be getting the film in January. If a country besides Japan is getting it, then that means it will be subbed. I'd say we have a better chance of getting a high quality version then.
In other words, we'll most likely get a watchable, subbed version within a month or two.