The Joker could be a great villain. Imagine if the Joker - like character emerged in the My Hero Academia world. Izuku, with his new Batman - inspired skills, would have to use his wits to outsmart this chaotic and unpredictable foe.
A plot could also revolve around a multiverse concept. In this scenario, Izuku from an alternate universe where things went horribly wrong is a villain. She might cross over into the main universe and cause chaos or try to change things to match her own world's situation. This allows for interesting character interactions and power dynamics as the regular characters have to deal with this different version of Izuku.
Another place to check could be FanFiction.net. Some authors might explore the concept of a female villain Izuku in their stories there. However, the quality can vary greatly, so you may need to sift through a bit to find the ones that are well - written.
All Might would probably be in it. Since he's Izuku's mentor, he could play a role in helping Izuku understand and control his time - controlling power. Maybe he has some past experience related to time powers that he shares with Izuku.
In many adopted Izuku fanfictions, his character develops confidence. For example, if he's adopted into a loving family, he no longer has the self - doubt that plagued him before. He starts to believe in his abilities more. This new family support gives him the boost he needs to train harder and become more assertive in his hero journey.
Bakugo is often paired with Izuku. Their relationship is complex in the original series, and in fanfiction with Izuku's time quirk, it could add more depth. Bakugo might be jealous of Izuku's new power at first but then come to respect it as they face challenges together.
He wasn't sure. The information I know about the source and background of the Ao Ao awaiting arrest comic is very limited. It could be adapted from a novel or an original. If you can provide more information about the manga, I will try my best to answer your questions.
All Might could also be a potential hero to save Izuku. He has a strong bond with Izuku and his presence alone could intimidate Overhaul. He would use his experience and power to rescue Izuku from the dangerous situation.
His classmates like Bakugo could be a main character. Bakugo might be one of the first to notice the strange changes in Izuku and could be both scared and angry about it. He might try to confront Izuku, which could lead to some intense scenes.