Just wanted to comment on last page's OPM game idea. There was a Superman game that actually had a good mechanic, had it been fleshed out more. The point of the game was to take down villains, but the health bar was actually the city's health bar. This makes the most sense considering Superman would always hold back or do his best to protect his city and also considering giving superman a health bar has always been a dumb idea.
A great way to flesh this out would be, instead of endless/mindless fighting like a musou, change the story up a bit and add objectives for Saitama to do, in order to climb through the ranks of Hero Corp. You'd go from saving cats to stopping burglars, etc. Depending on how good you do it, events might progress differently with the people around you.
You'd also have to try and make sure to get people to know who you are and make sure to keep your fan club growing. In regards to relationships with the heroes, it would work like a mix of Persona dialogue system/Telltale one. As you climb through the ranks and missions become harder, you'd have to worry about saving people and heroes/making sure they don't die on their health bar instead of worrying about your own health, because you're just about invincible anyway. Also, things could be mixed up in the future by adding elements like sending out lower tiered heroes on jobs and making sure they complete them to help the city's status.
This is all just an idea but if fleshed out, it would make the game stay varied, fresh and fun while not breaking the canon nor making it yet another musou or fighting game.
