The Boku No Hero Academia Hero Fes 2020 had a lot of different segments to it with all the voice actors and actresses in the official art!
There were live readings of Season 4 highlighted scenes, a mini game that 4 teams had to play, as well as a funny drama skit about Deku and everyone getting isekai’d into a dream world where they were part of the U.A. Troops fighting against the Big 3.