A plotline could involve the Todoroki children getting caught in a large - scale villain attack in the city. All Might, being the number one hero, swoops in to save them. Maybe one of the children has a special ability that the villains are after, and All Might has to protect them while also dealing with the other threats. It could also be that the Todoroki children are facing some sort of discrimination because of their family name, and All Might steps in to show that they are worthy of protection and support.
Perhaps in the fanfic, the Todoroki children are on a mission gone wrong. They end up in a situation where they're outnumbered by villains and in over their heads. All Might, who has a sixth sense for when people are in trouble, shows up just in time. He not only saves them from the villains but also helps them learn from their mistakes. There could also be a plotline where the Todoroki children are dealing with some internal family struggles, like Shoto's conflict with his father's legacy. All Might could save them from making bad decisions influenced by these struggles, guiding them towards a more positive path.
One possible plotline could be that the Todoroki children are kidnapped by a villain group who wants to use them against Endeavor. All Might then tracks them down and rescues them in a big showdown. Another plotline might be that the children are in danger within their own home due to Endeavor's past mistakes coming back to haunt them, and All Might intervenes to keep them safe.
The 'all might saves the todoroki children fanfic' probably focuses on the relationship between All Might and the Todoroki children. All Might is a symbol of hope in the My Hero Academia world. The Todoroki children, coming from a complex family background, might be in need of that hope. All Might could be saving them from physical harm, or perhaps from the emotional turmoil caused by their family situation. For example, if they're being targeted because of their father's actions, All Might would be there to protect them.
The character dynamic between All Might and Dabi could be very interesting. All Might is the paragon of heroism, while Dabi is a rather conflicted anti - hero/villain. All Might saving Dabi might start with a lot of distrust from Dabi's side. But as time passes, Dabi could start to respect All Might. For the Todoroki family, if they find out All Might saved Dabi, it could be a mixed bag of emotions. Shoto might be hopeful for his brother's change, while Endeavor could be skeptical.
One possible plot could be that Dabi, who is a Todoroki, gets into a life - threatening situation during a battle against a powerful villain. All Might, being the symbol of peace, steps in to save him. This could lead to Dabi having a change of heart about heroes, especially since All Might represents everything he once despised but now sees the true selfless nature of heroism through his actions.
Maybe the fanfic could focus on the brother's backstory. He might have been bullied as a child because of his family name or his lack of a 'powerful' quirk at first. This could lead to him developing a strong sense of justice and a desire to protect those who are weak. His journey from a bullied kid to a confident hero - in - training would make for an interesting story.
A plotline could involve Petunia having a change of heart due to a magical event. For instance, she might accidentally stumble upon some of Harry's magic or receive a message from the wizarding world about his importance. This could lead her to stand up against Vernon and protect Harry. She could then start to teach Harry about his mother's side of the family and the magic that runs in his veins in a more positive way than the Dursleys ever did. And perhaps she even helps him develop his magic skills secretly before he goes to Hogwarts.
In an 'All Might Dating Izuku's mom' fanfic, a plotline could start with All Might and Izuku's mom meeting by chance in their younger days. As they get to know each other, a relationship blossoms. This could then create a situation where All Might has to balance his role as a hero and his new relationship. Meanwhile, Izuku might grow up with a different understanding of his hero and his family. Or perhaps the plot could involve All Might having to keep his relationship a secret from the public due to his status as a symbol of peace, which adds a layer of secrecy and tension to the story.
One possible plotline could be that All Might takes on a fatherly role to a young girl who is a big fan. He could mentor her in developing her own heroic abilities, like teaching her how to use her quirk effectively. Maybe she's an orphan and he becomes a surrogate father, guiding her through the difficulties of growing up in a world full of villains.
A plotline could involve Naruto finding a hidden power within the Uchiha clan that was overlooked. He uses this power to unite the clan and make them strong enough to resist any threats. Maybe this power is related to an ancient Uchiha technique that Naruto helps to rediscover. He then uses his charisma and leadership skills to convince the Uchiha to work with the village instead of against it.
One possible plotline could be that Midoriya's 'bug balls' (assuming it's some unique quirk - related concept) accidentally bring him and Todoroki closer in a way that makes them realize their feelings for each other. For example, the bug balls might have some sort of pheromone - like effect that makes them more attracted to one another.
One possible plotline could be that Lockhart attempts to use Harry for some self - promoting stunt that goes horribly wrong, and Severus steps in to rescue Harry from the immediate danger. For example, Lockhart might try to make Harry participate in a dangerous magic display for his own glory, but Severus, seeing the real danger, intervenes.