I've been watching the anime... it made have doubts about the movie.
The character named Ayano Hōjō is voiced by Sayaka Nakaya (who does a great job) and is played by Miichan in the movie. This girl "is incredibly shy, usually saying little else besides Oh, yeah, right." To me, casting Miichan as this character seems like a huge mismatch. She's gotta do some great acting to pull that off.
Secondly, the protagonist tries to manage the baseball team... That in itself is a pretty boring storyline, but I can't really imagine how Acchan can spice it up a bit. I guess we'll find out soon enough.
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edit: finished the anime. I think Acchan will do just fine. I still feel Miichan is wrong for her part, they could've gone for Nakayan instead.