Perhaps the reincarnated character has a special ability that allows them to communicate with the unique monsters in the Tensura world. This ability could lead to forming alliances that no one else could, and they could use these to their advantage to gain power and protect the world from new threats.
One idea could be that the reincarnated character has knowledge of future events in the Naruto world. For example, they know about the Akatsuki's true intentions from the start and can start preparing the Hidden Leaf Village earlier. Another plot could be that they have a special power from their past life that no one in the Naruto world has seen before, like the ability to control modern technology within the ninja world. A third idea is that they are reincarnated as a side character and their actions end up changing the entire course of the original Naruto story in unexpected ways.
One idea could be that the reincarnated character has memories of the future of the Boruto world. So they try to prevent certain disasters from happening, like the fall of Konoha. Another could be that they use their modern - day knowledge to revolutionize the ninja technology in the Boruto universe.
One idea could be that the reincarnated character has knowledge of future events in the Danmachi world. For example, they know about certain monsters' weaknesses or hidden treasures. This could give them an edge as they navigate the dungeon. Another could be that they are reincarnated as a non - human race in the Danmachi world, like a spirit or a dwarf, and they have to deal with the different cultural and physical aspects of that race. A third idea is that the character reincarnates with a special ability that doesn't exist in the normal Danmachi world, like the power to control time on a small scale, which would completely change their adventures in the dungeon.
One idea could be that the protagonist, reincarnated as a dinosaur, tries to prevent the extinction event. They could use their human knowledge to find a way to survive the impending asteroid or environmental changes.
A third plot idea could be the relationship between the sword and the other characters. Since it's reincarnated as a sword, it can't communicate in the traditional sense. So, how it forms bonds with the people around it, like the protagonist who might be the one it eventually chooses as its wielder. It could be through dreams or visions that it imparts knowledge or feelings to the characters, creating a unique and complex relationship dynamic.
One idea could be reincarnating as a vampire hunter who then falls in love with a vampire. Another could be being reincarnated as a long - lost relative of one of the main characters and causing chaos in the vampire - human relationships. Or perhaps being reincarnated as a wolf shifter with a special ability that changes the power dynamics in the Twilight world.
One idea could be the main character exploring a new, hidden part of the slime world that has unique magic and creatures. For example, a place filled with sentient plants that can communicate with slimes.
A possible plot is that the reincarnated person has a special power from their previous life that doesn't exist in the Dragon Ball world yet. Maybe it's a unique form of magic. This new power attracts the attention of both the heroes and the villains. The Z - fighters might be curious and want to learn from it, while the villains see it as a means to gain an advantage over their enemies.
A really interesting plot for 'Reincarnated in DC Universe fanfiction' could be that the reincarnated character is from our world and has a deep knowledge of all the DC characters' backstories. They are reincarnated as a minor character in Arkham Asylum. Using their knowledge, they try to rehabilitate some of the villains there, like the Riddler or Two - Face. They could introduce new therapies or ways of thinking that might actually start to change the villains for the better. This would be a unique take as it focuses on the psychological aspect of the DC universe rather than just the action - packed superhero battles.
Well, a great plot could be the reincarnated Gojo trying to change the fates of his comrades from his previous life. He could use his knowledge of the future to prevent their deaths or misfortunes. Also, he might face challenges from other powerful sorcerers who are jealous of his power or suspect his true identity. This could lead to some intense battles and power struggles.