Another plot could involve a powerful and mysterious quirk user emerging who has the ability to control minds. This person starts to manipulate heroes into believing that other heroes are traitors. As a result, paranoia spreads throughout the hero community, and a civil war breaks out. The fanfic could then focus on how the students and unaffected heroes try to uncover the truth behind this mind - controlling quirk user and stop the civil war before it's too late. Along the way, there would be intense battles between heroes who were once friends, with each side believing they are in the right.
The main plot could also be about a corruption scandal within the hero ranking system. A group of heroes discovers that the rankings are being manipulated for political and financial gain. They decide to expose this, but the establishment tries to silence them. This leads to a civil war between the heroes who want to expose the truth and those who are trying to maintain the status quo. The students at U.A. would get involved as they learn about the situation and start to question the integrity of the hero world they are training to be a part of. They would have to decide whether to support the rebels or stay loyal to the system they were taught to believe in.
One possible plot could be that the villains in My Hero Academia somehow get their hands on the Infinity Stones. They could use the power of the stones to start warping reality. For example, they might use the Reality Stone to make the heroes' quirks ineffective or change the very nature of the hero society. The heroes would then have to band together, not just from UA but from all over the world, to try and stop the villains from completely taking over. They would need to figure out how to combat the power of the Infinity Stones, perhaps by finding some sort of counter - quirk or ancient hero relic.
In a My Hero Academia Civil War fanfic, the heroes-in-training could be split in various ways. Class 1 - A students like Deku might side with the more traditional hero values, aiming to uphold the law and protect civilians without overstepping boundaries. Bakugo, on the other hand, could potentially be on a side that believes in a more aggressive approach to taking down villains, seeing the current hero system as too restrictive. Characters like Todoroki, with his complex family history, might be torn between the two sides, trying to find a middle ground that reconciles his father's strict hero ideology and his own beliefs about justice.
Perhaps in the fanfic, there could be a villain who is trying to steal the cutie marks of the ponies in the MLP world and use their power for evil in the My Hero Academia world. The heroes from both universes would then have to team up. Deku could use his One For All to protect the ponies, while the ponies could use their friendship magic to support the heroes in combat.
Another possible plot is a competition between Superman and the top heroes in My Hero Academia. They hold a friendly, but intense, competition to see who is the most powerful and heroic. This would not only showcase their different powers and abilities but also how their concepts of heroism differ. It could lead to a lot of character development for both sides as they learn from each other.
Well, it could be about the heroes from My Hero Academia getting caught up in the events of Infinity War. Maybe Thanos targets the quirks in the MHA universe. Deku might try to use his One For All to stop Thanos, seeing it as a great evil. And the Avengers could be confused by the existence of quirks at first.
One possible plot could be that Naruto somehow gets transported to the world of My Hero Academia. He could be mistaken for a new type of Quirk user at first. Maybe he tries to understand their system of heroes and villains while also showing off his ninja skills, which would be really unique in that world. And he could end up teaming with some of the My Hero Academia characters to fight a common enemy that threatens both worlds.
One interesting plot could be that a Prototype character, say Mercer, somehow gets his powers transferred to a My Hero Academia villain. This villain then becomes extremely powerful and starts causing chaos in a way that the heroes can't handle. The heroes have to figure out how to stop a foe that can shape - shift, regenerate, and has superhuman strength. They seek help from the Prototype world, and a character from there has to work with the heroes to find a way to reverse the power transfer or at least find a weakness in the empowered villain.
One possible plot could be an OC who is a gamer and discovers they can use their gaming skills in the My Hero Academia world. For example, they might be really good at strategic planning in games, and this helps them create unique battle strategies against villains. They could start as an underdog, with classmates doubting their abilities because they seem more focused on gaming than hero training. But as they prove themselves in battles, they gain respect and also inspire others to think outside the box when it comes to heroics.
Well, the plot could involve a quirk experiment gone wrong that creates portals between the two universes. The Avengers and the MHA heroes end up on the wrong sides. At first, there's a lot of misunderstanding and fighting between them. But then they realize that there's a bigger threat behind all this chaos. For instance, Loki could be working with a MHA villain to take over both worlds. The Avengers and the MHA heroes then have to put aside their differences and work together to stop this evil plan. The story could explore how different powers interact and how characters from two very different universes grow to respect and rely on each other.
One possible plot could be that the characters from My Hero Academia are suddenly transported to the world of Blue Exorcist. They have to team up with the exorcists there to fight a new common enemy that has powers similar to the quirks in My Hero Academia but also has demonic abilities. For example, Izuku could learn some exorcist techniques from Rin and use his quirk in new and creative ways to combat this threat.