Three-way crossover.
For 16 years, Izuku Midoriya has been living in Mutsufu with his loving family for about three months now. He lives in his old apartment with his loving wife, Helen Midoriya, and their three kids, Violet Inko Midoriya, Harashi 'Dash' Midoriya, and Jack-Jack Midoriya. This family isn't like most normal families in Japan, ish.
Helen Midoriya was once a retired superheroine of the USA - Elastigirl who was active for a good time way before the illegalization of supers in America. She got married to Izuku Midoriya around the same time the discussion of banning supers in America happened.
Izuku Midoriya was once a promising young man who was a student at UA, but his dreams were crushed by his classmates and his teachers when they betrayed him. Then one night he became a vigilante known as The Batman of Mutsufu.
Years later...
Both heroes decided to quit heroing. Helen retired from heroing because of the laws in America preventing her from doing so. Izuku retired from being Batman because when Izuku found out that Helen was pregnant with his child, he decided to stop fighting crime altogether. The two grew an amazing, loving, and INCREDIBLE family.
Years later...
Izuku and Helen moved their family over to Japan as Helen was given a job to teach at UA. With Helen partially returning to her career as Elastigirl to teach the next generation, Izuku is thrown back into life as Batman once more.
[MHA, Incredibles, DC Comics are not owned by me] Warning: Lemons in this fanfic, mentions Izuku's betrayal by Class 1-A years ago, NXT. GEN comics, foul language]