Honestly, it was fine. Just a movie to put that arc somewhere, I get it.
Nothing special really, there are some anime movies continued from a series that I love, this was eh, okay.
The girl that we get introduced to with the glasses though is very pretty, just felt like I had to add that in since this series is known for it's lovely ladies, although as we know it obnoxiously sexualizes them.
Anyways okay movie, it's kinda just something to watch if you want to I guess.
From my experience you can understand MHA just fine without watching this movie I believe.
So yeah, it's just whatever.