One interesting plot twist could be that Izuku initially doesn't know about his father's true identity. He grows up believing he has no quirk and then discovers his father is All For One. Another twist could be that All For One has some hidden motives for fathering Izuku, like using him as a pawn in a bigger scheme against the heroes.
In some fanfics, a plot twist could be that Izuku has latent powers related to All For One that start to emerge unexpectedly. This throws his whole understanding of himself and his place in the hero - villain world into chaos. Also, there might be a plot twist where Izuku's mother was actually in on the secret of his father all along and has been protecting Izuku from All For One's influence in her own way. This would completely change Izuku's perception of his family. Another interesting twist could be that All For One is actually trying to redeem himself through Izuku, which goes against his villainous nature in the original story.
One interesting plot twist could be that Female Izuku discovers she has a unique quirk that All Might didn't initially anticipate. This quirk might be related to some ancient power that suddenly emerges during a crucial battle. Another twist could be that her biological parents are actually villains in disguise, which adds a whole new layer of conflict and self - discovery for her. And perhaps there's a plot twist where All Might's own past is somehow intertwined with Female Izuku's origin in a way that changes their relationship dynamic completely.
One interesting plot twist could be that Izuku initially struggles to control the All For One quirk. Since it's a very powerful and complex quirk, he might accidentally absorb quirks from his friends or allies, causing a rift between them. For example, he could absorb Uraraka's zero - gravity quirk and she feels violated. Another plot twist could be that the League of Villains, thinking Izuku is now one of them because of the All For One quirk, try to recruit him. Izuku has to pretend to go along with them to gather intelligence, but it becomes a dangerous game as he risks being corrupted by their ideology.
One idea could be Izuku struggling to control the All for One quirk at first. He might accidentally absorb quirks he doesn't want, leading to chaos. For example, he absorbs a quirk that makes him grow extra limbs and has to figure out how to hide it. Another could be that villains target him more, thinking he'll be easy to corrupt with such a powerful quirk.
One interesting plot development could be Izuku unlocking a new power during the fight. This new power gives him an edge and surprises All for One.
One common theme is the struggle with identity. Izuku would have to deal with the fact that his father is a major villain. Another theme is power. He might inherit some of All For One's powers in different ways, and how he uses or resists those powers. Also, redemption could be a theme. Maybe Izuku tries to atone for his father's actions in some fanfics.
Yes, it is a somewhat popular fanfic concept. In the My Hero Academia fandom, exploring different family relationships for the characters adds an interesting twist. This concept allows for new storylines and character developments that deviate from the original canon. It gives fanfic writers a chance to re - imagine Izuku's backstory and the implications of having such a powerful and villainous father figure.
Well, one interesting plot point could be Izuku unlocking a new power specifically to counter All for One. Maybe it's a hidden aspect of One for All that he discovers during the intense battle.
One possible plot twist could be that the revelation of Izuku being All Might's son makes him a target. Villains might see him as a valuable hostage or a way to get back at All Might. Another twist could be that there are some hidden powers or abilities that Izuku inherits from All Might that were previously unknown. This could change the way he fights and his role in the hero world.
One interesting fanfiction could be where Izuku uses the combination of All for One and One for All in unique ways to defeat powerful villains. He might use All for One to take away the quirks of enemies and then use One for All to enhance his physical abilities to an even greater extent than normal.
One interesting izuku all for one fanfiction could be where Izuku uses the All for One power in unexpected ways to save his friends. For example, he might use it to transfer quirks temporarily to those in need during a battle, creating unique and exciting fight scenes.