Well, it could be about Ichigo teaching Izuku some combat skills. Since Ichigo is a powerful Soul Reaper, he might show Izuku how to better use his physical strength and speed in battle.
The plot might involve them teaming up against a common enemy. Maybe an evil force from Ichigo's world that has somehow crossed over into Izuku's, and they have to combine their unique powers to defeat it. Izuku's strategic thinking and Ichigo's raw power would make for an interesting combination.
The plot could involve a tournament - style scenario where heroes and shinigami from different universes are gathered. Ichigo and Izuku are pitted against each other in the first round. However, instead of fighting, they realize that there is a greater conspiracy at play. Some powerful entity is trying to use the tournament to drain the powers of all the participants. So, they decide to work together, combining Ichigo's zanpakuto skills and Izuku's One For All quirk to expose and defeat this hidden enemy.
It's hard to say. Ichigo has his Soul Reaper powers which are incredibly strong. He can cut through almost anything with his Zanpakuto. But Izuku has One For All which gives him superhuman strength, speed, and the ability to jump really high. So it depends on the situation.
One possible plot could be that Ichigo is kidnapped by a powerful and unknown enemy. This enemy might be from a different realm or a secret organization within the Bleach universe. His friends then embark on a quest to find him. They might face various challenges and battles along the way as they try to track down Ichigo's location.
Ichigo would likely be a bit brash at first. He's used to dealing with things on his own terms in the world of 'Bleach'. Izuku, on the other hand, would be very respectful and inquisitive. He'd probably ask a lot of questions about Ichigo's powers. Ichigo might be a bit impatient with all the questions but would soon realize that Izuku is genuinely interested. They'd start to bond over their shared desire to protect others.
The plot could involve the Vizards, with their unique powers and experiences, encountering Kazui Kurosaki. Maybe they sense his latent power and decide to train him, leading to a series of adventures where Kazui learns to control and expand his abilities under their guidance.
One possibility could be that Ichigo is under some sort of mind - control. Maybe an enemy has found a way to manipulate his actions and he ends up hurting Rukia without meaning to. This could lead to a lot of internal conflict for Ichigo once he realizes what he has done.
One possible plot could be that Izuku, in his journey to become a great hero, discovers some hidden knowledge or power left behind by Nana Shimura. He might find an old diary or a secret training ground that was once used by her. This encounter could give him new insights and inspiration for his hero training.
One possible plot could be that Izuku, with his determination and unique quirk, somehow gets transported to the Marvel universe. There, he meets Iron Man. Iron Man, being the genius he is, is initially skeptical of Izuku but soon realizes his potential. They might team up to fight a common enemy, perhaps a villain who has technology - based powers that combine aspects of both their worlds.
It could be a rogue Soul Reaper. Maybe someone who has turned against the Soul Society and sees Ichigo as a threat or a valuable asset. They might want to use his power to gain control over the Hollows or to overthrow the existing power structure in the Soul Society.
Well, a plot could involve Ichigo being turned into a vampire against his will. He then has to deal with the internal conflict of his human morals versus his new vampiric instincts. He might find that some of his friends are scared of him, while others are determined to help him find a way to reverse the transformation. And there could be a love interest who accepts him despite his new nature, adding a romantic sub - plot to the story.