In the fanfic, Naruto could receive Orochimaru's unique form of chakra manipulation. This would allow him to do things like transform his body parts into snake - like appendages for better attack and defense. And perhaps he gets the power to resist certain types of genjutsu more effectively, as Orochimaru has developed ways to counter illusions. There's also a possibility that he gets a power boost to his physical strength and speed, similar to how Orochimaru has enhanced his own body over the years.
He could have the power to instantly heal any injury. His chakra might be so vast that he can create multiple clones without getting tired. Also, he might be able to control the elements in ways that are beyond normal shinobi capabilities.
Naruto's powers would be a strange mix. He could inherit Orochimaru's ability to regenerate, but in a more Uzumaki - style way. His rasengan could be infused with snake venom or some sort of snake - based chakra. And he might be able to use Orochimaru's body - switching jutsu in a modified form, perhaps using it not for evil but for strategic purposes in battles.
If Naruto is brainwashed by Orochimaru, he may gain some forbidden jutsu that Orochimaru has been researching. These jutsu could be extremely powerful but also very dangerous. On the power - losing side, he could lose his ability to communicate with the spirits of the past Hokages, as Orochimaru's influence might sever that connection. His Sage Mode could also be affected. He might not be able to enter it as easily or at all, since Orochimaru's brainwashing could change his chakra nature and balance. Additionally, Naruto might gain the ability to summon different kinds of snakes, which is a trademark of Orochimaru, but this could come with the loss of his own unique summoning abilities.
In some Orochimaru lemon fanfic, he might be portrayed as having a more seductive or alluring side. However, this is a very unorthodox view compared to his original character in the Naruto series. His intelligence and cunning nature might still be emphasized, but in a more sexually charged context which is not really in line with the official Naruto story.
I recommend "Naruto: Murder of the Blood" and "Naruto: The Beginning of the Awakening of the Corpse Vein." Both of these novels are Doujinshi novels with Orochimaru as the main character. In "Naruto: Murder of the Blood", the main character walks through the Ninja Realm as Hiroto Norikazu, causing the entire Ninja Realm to tremble and tremble. The protagonist in "Awakening the Corpse Vein at the Beginning" had the ability to devour blood and chakras to obtain other people's abilities, talents, and memories. He grew from a small assistant under Orochimaru to a shadow that controlled Ninja Realm. Both novels are very interesting. You can read them. I hope you like this fairy's recommendation. Muah ~😗
In some fanfictions, Orochimaru might develop a sense of loyalty towards Naruto. After being around Naruto for a while, he could see Naruto as someone worthy of his loyalty. This could lead to him being more open to working with the Hidden Leaf and helping Naruto in his various missions. He might even sacrifice his own interests to protect Naruto at times, which is a complete turnaround from his initial character.
Well, in some fanfictions, Orochimaru might use some forbidden jutsu. He could have combined his knowledge of resurrection techniques with some unique chakra sources. Maybe he found a way to reverse the death process by using the power of the snakes he has a connection with. For example, he could have used the regenerative abilities of the snakes' chakra to bring Naruto back to life.
In some fanfics, Naruto might use his new and powerful jutsu that he has mastered over time. Maybe he combines his Sage Mode with the power of the Nine - Tails in a unique way that Orochimaru can't counter. For example, he could use the Nine - Tails' chakra to enhance the range and power of his Sage Mode attacks, and then catch Orochimaru off - guard.
Well, in some versions, Naruto might use his new and improved Rasengan techniques. He could have combined it with his Sage Mode powers to overpower Orochimaru. Maybe he also uses his quick thinking and the element of surprise, since Orochimaru is always so full of his own schemes.