What are some interesting ideas for One Punch Man comic fanfiction?

For One Punch Man comic fanfiction, you could write about an alternate timeline where Saitama never became a hero. Maybe he chose a different career path, like becoming a chef or a teacher. How would the world of One Punch Man be different without him? Another idea is to do a fanfiction that delves into the minds of the monsters. What are their motives? Are they really all bad? You could create a story where a monster tries to reform and become a hero. Also, a fanfiction that focuses on the relationship between King and Saitama could be great. King is seen as a very powerful hero, but Saitama knows the truth. Writing about their friendship, misunderstandings, and how they support each other in different ways would make for an interesting story.

One idea could be exploring the backstory of Saitama before he became so powerful. Maybe he had a difficult training regime that involved some unique challenges. Another idea is to write a fanfiction where Genos and Saitama have to face an enemy that can nullify Saitama's power, forcing them to rely on strategy and Genos' upgrades more than ever. Also, a fanfiction about the other heroes in the One Punch Man universe forming a team without Saitama and having to deal with a powerful threat on their own could be really interesting.