High School’s Class 1-A find themselves busy on a faraway island in Heroes Rising. Much like the first My Hero Academia movie, Two Heroes, the students of U.A.
If you’re not caught up with at least the beginning of Season 4, you do run the risk of some mild thematic spoilers, but a majority of the movie smartly distances itself from current events in the anime series. Flashbacks are mostly used at unobtrusive moments and important information is naturally written into conversations. That being said, Heroes Rising is a prime example of effortlessly utilizing information from the show's past to contextualize the events of the movie. Heroes like Rock Lock appear, the League of Villains are still up to no good, and a certain pivotal item from Season 4 makes an appearance. Heroes Rising takes place sometime during Season 4, although the chronology is never established.