There could also be a plot where the reincarnated character is a regular human who discovers they have a special connection to the Infinity Stones. They then have to avoid being hunted by powerful villains like Thanos while also trying to figure out how to use their connection to the Stones for good without getting corrupted by their power.
Another plot might involve reincarnation as an Asgardian. The character then has to deal with the politics and power struggles in Asgard. They could be caught in the middle of Thor's and Loki's conflicts while also trying to adapt to their new divine abilities and the different culture of Asgard.
Tony Stark is also often reincarnated. It gives the opportunity to change the course of his life. For example, the reincarnated Tony could prevent some of the mistakes he made in the original story, like creating Ultron, or he could be given a different set of skills or knowledge at the start of his journey as Iron Man.
One interesting concept could be the idea of having knowledge from our world and using it in the Marvel universe. For example, knowing the future events of certain storylines and trying to change or manipulate them for the better. Another concept might be the unique powers the reincarnated character could gain, like a combination of powers that don't exist in the original Marvel canon.
Perhaps the reincarnated character has to face a situation where they are not fully accepted as Goku by his friends and family. They then have to prove themselves not just in terms of strength but also in terms of character, and in the process, they form new and deeper relationships with the Z - fighters.
One interesting plot could be a character reincarnated as a powerful mage in the Warcraft universe and having to navigate the complex politics between different mage factions. They might have to use their modern - world knowledge to outwit their rivals.
One interesting plot could be the dragon's struggle to adapt to its new form. For example, it might have to learn how to fly and hunt in a completely different way than it was used to in its previous life. Another plot could involve the dragon's interaction with other mythical creatures. Maybe it forms an unlikely alliance with a unicorn or has a territorial dispute with a griffin.
One interesting plot could be the reincarnated character using Gohan's latent power in unique ways. For example, they might quickly master new forms like Super Saiyan 2 and use it to protect the Earth from threats that were previously not faced in the original story. Another plot could involve the character's modern - day knowledge affecting how Gohan interacts with other characters. They could introduce new training techniques or ways of thinking to the Z - fighters.
One interesting plot could be a character reincarnated as a Pikachu and having to navigate the world of Pokemon using only Pikachu's abilities like electric shocks and agility. Another might be reincarnated as a rare Pokemon and trying to avoid being captured by trainers. Maybe also being reincarnated as a Pokemon trainer's pet and experiencing the bond from the Pokemon's perspective.
One interesting plot could be the protagonist using their modern - day knowledge to change Sakura's fate in the Naruto world. For example, they might help her become a stronger ninja earlier by introducing new training methods.
One interesting plot could be Naruto having to adjust to his new slime form. For example, he might struggle with not having hands in the traditional sense at first but then discovers unique ways of using his slime body for combat or daily tasks. Another plot could be Naruto using his ninja knowledge in the slime world. He could teach the slimes some of his ninja techniques, like how to move stealthily or use basic chakra concepts in their own slime - based magic system.
One interesting plot could be the protagonist, reincarnated as Misty, using her knowledge from the previous life to train Pokémon in new and unique ways. For example, applying modern training techniques to Pokémon in the Pokémon world. Another plot might involve Misty making new friendships with other trainers or Pokémon that she didn't interact with much in the original series. And perhaps she could also discover some hidden secrets about certain Pokémon species that were unknown before.