Well, Naruto might learn some really cool magic stuff from Doctor Strange. He could use magic instead of chakra in some ways. Maybe he'd have a different fighting style, like using magic seals instead of hand signs for jutsu.
His personality could be a mix of his original self and Doctor Strange's traits. He would likely be more intellectual, thinking deeply about things before acting. Since Doctor Strange has a lot of knowledge about the multiverse, Naruto might be more curious about things outside his village and the ninja world. He might also be a bit more solitary at times, as Doctor Strange often works alone in his studies, but still retain his friendly nature towards those he trusts.
In such a fanfiction, Harry Potter would probably grow up with a much different set of values. Doctor Strange is often about protecting the world from threats from other dimensions. So Harry could be trained to face threats that are not just from the dark wizards in his own world. He might also have access to some really cool artifacts from the Marvel universe. And his relationships with his friends would be different too. Instead of just Hogwarts classmates, he could have allies from different realms.
One idea could be that Naruto is somehow transported to the Marvel universe and meets Doctor Strange. Doctor Strange could sense Naruto's unique chakra and be intrigued. He might offer to train Naruto in new forms of magic that are similar to his jutsu. Naruto, in turn, could show Doctor Strange some of his ninja skills, like his shadow clone jutsu which could be useful in combat situations in the Marvel world.
In this kind of fanfiction, the main antagonists could be a combination of the traditional Harry Potter villains like the Death Eaters and new threats from the Marvel side. For instance, Dormammu could somehow sense Harry's potential and try to either possess him or destroy him to prevent him from becoming a powerful force against him. And of course, there would always be some wizards in the Harry Potter world who are against any kind of change or outside influence, and they could also oppose Harry.
One possible plot could be that Naruto discovers the world of Doctor Strange through some kind of interdimensional rift. He is intrigued by Strange's magic and decides to learn it. Naruto, with his already existing chakra abilities, might find a unique way to blend his ninja skills with the magic of Doctor Strange. For example, he could use his shadow clone jutsu in new ways, like sending clones into different magical dimensions to gather information or power sources.
Here are a few recommendations for weird doctor-type novels:
1. The story takes place at the end of the Sui Dynasty and the beginning of the Tang Dynasty. A modern borderless battlefield doctor transmigrated here, saved a city, and started the carefree life of the Great Doctor of the Common People.
2. " Willing to Be Your Little Love Letter ": The story was about Bei Zhiruo, a doctor from Doctors Without Borders who had just returned to China. She faced all kinds of strange situations every day.
3. " Strange Arrival: I Become a Doctor ": The male protagonist of the story was Gu Dong, a doctor who only wanted to save the dying and heal the wounded. There were other characters in the story, such as Wolf Seven and Congming Zhou.
Please note that the novels recommended above may not be completely related to Doctor Strange, but they belong to the Doctor Strange genre.
Naruto could be shown as a bit of an outcast in the beginning. Since his love for Doctor Strange's magic is not understood by his peers in the ninja village. However, his determination to master this new form of power would make him stand out. He would be constantly trying new spells and techniques, sometimes getting into trouble but always learning from his mistakes. His character would also bring a sense of humor to the usually serious world of Doctor Strange's magic.
If Naruto and Doctor Strange fought, it would be an interesting match. Naruto is extremely powerful with his chakra and various jutsu. However, Doctor Strange has the power of the mystic arts. Doctor Strange could potentially use his magic to trap Naruto in another dimension or create illusions to confuse him. But Naruto's speed and his ability to sense danger might allow him to avoid some of Doctor Strange's attacks and get close enough to land a powerful punch or use a jutsu like Rasengan.
It could have elements of time travel and interdimensional adventures, given the Doctor Who influence. Maybe Naruto discovers hidden powers related to manipulating time and space.