Personally, I found the anime pretty disappointing. Regardless, I'm actually pretty excited for the movie.
I have a feeling it's gonna be an anime verse story. Though it seems, like in recent chapters, some of what was in the anime is actually canon to a degree.
Though I think the movie is going to be a more exclusive story. That's what anime movies are usually like right?
I think, as long as they don't try too hard, stick to the solid elements, this movie won't be entirely disappointing.