I'm currently writing a musical for fun. I did the same thing with another show and its current status is good so far.
Thing is, the musical I want to write takes place during Midoriya's, Bakugo's and Todoroki's childhood, with the "Todoroki's Happy Childhood AU".
It will have 20+ songs (not finalized), possibly a large cast of characters, and uses the "past and present storyline". Basically, most events will be shown in the past while there are also events that happened in the present for the sake of the plot.
Please let me know if it's interesting! I would be releasing this next year, on my Wattpad account, where the other musical is also there.