Here's something I discovered I think some might enjoy. Included in the Japanese Blu-Ray release of Season 4 was a mini light novel, written by the woman who writes the School Briefs books, called "Cultural Festival Wrap Up Party", which basically just focuses on the kids the day right after the Cultural Festival having a little get together. If you enjoyed the SB stories, I definitively recommend checking out this fan translation, seem it seems most likely this won't come over here, and it is a very cute and funny story.
https://aitaikimochi.tumblr.com/post/626905316002529280
And, in extremely recent and exciting news, this image was just posted on the main MHA website, and across their social media, heavily hinting toward a 3rd movie, with the phrase, "He will meet 'The Three Musketeers'".
Attachment 102529
https://twitter.com/animetv_jp/statu...722589697?s=20
Obvious speculation is this will focus on the main trio during their internships sometime before the events of the current arc.