Accidentally-Correct Writing: In chapter 10, All For One states he's a second-generation Quirk user. Almost a year later its revealed in My Hero Academia that he is one and his mother was one of, if not the, first Quirk user in the manga, albeit she never knew.
The "AFO Versus The Golden Guard" arc was originally going to be extended to nine chapters. However, the author decided against this and make just two instead so that Luz can get to the Boiling Isles quicker.
The author originally planned to give Luz a Quirk called "Card-Drawer" but instead intends to give to Natasha Nolsen and demonstrate what it can do in a One-Shot Fic.
Word of Gay: Charlie, the Wittebane transporter assassin, is a Genderfluid character. If the author kept Charlie alive and had him continue to show up in the story, they would've went from She/Her pronouns back to using He/Him pronouns, and would've switched it again until Charlie was killed off.
