One idea could be that Saitama from OPM ends up in the RWBY world and participates in a Grimm - slaying tournament. His overwhelming strength would shock everyone, and he might just be in it for the free food at the event.
Metal Bat in One - Punch Man (OPM) fanfiction often has his character explored in various ways. Some fanfictions might focus on his backstory, like his relationship with his sister. In fan - made stories, he could be depicted in new battles, showing off his strength and his unwavering determination even more intensely than in the original manga or anime.
For example, if Saitama from OPM and Yang from RWBY were to fight together. Yang's semblance of getting stronger with each hit she takes could be interesting when combined with Saitama's already extreme strength. Saitama could observe Yang's fighting style and be impressed by her tenacity.
Another common portrayal is his relationship with other heroes being explored more deeply. For example, his interactions with Saitama. Some fanfictions might create a friendship or a rivalry between them that adds new dimensions to both characters. And his role within the Hero Association can also be re - imagined, like being in charge of a special task force.
Yes, the OPM manga has come to an end. The creators completed the narrative, providing closure to the fans. Although some might have hoped for more, what was presented was a comprehensive and conclusive tale.
Sure. In OPM fanfiction, a Metal Bat Dragon OC could be really cool. For example, it could have the strength of Metal Bat combined with the mystery and power of a dragon. Maybe it has a special attack where it can use its bat - like wings to create powerful gusts of wind while breathing fire at the same time. Writers often come up with such interesting concepts to make their stories stand out.