The biggest issue I had with the movie was the music. I love "You Say Run" and all but I was really hoping they'd spice it up, add more strings and trumpets. The same with the Theme of All Might. In the movie, you see All Might in his prime in a flash back. All Might at his BEST! But they just use the same music from the TV show for literally the entire movie. I could be wrong, but I think I heard only one new track in the entire movie, when we got an establishment shot of Deku's arrival on the Island.
Overall, it was your standard probably Non-Canon TV Show-Movie. It happened, and to my knowledge was never brought up on the TV show, except in a forth wall breaking promo for the movie after one of the season three episodes.