In the fanfic, Naruto could gain the power of astral projection, where he can send his spirit out to gather information or even attack enemies while his physical body is in a different location. He might also get the power of reality warping, being able to change the rules of the world around him. For example, he could make it so that his opponents' jutsu have no effect on him. Another potential power is the ability to create clones that are as powerful as his original self, not just simple shadow clones. This would multiply his strength many times over.
One possible new power could be the power to absorb and use any chakra, regardless of its origin. This would make him extremely powerful as he could draw from the chakra of his enemies or even from natural sources like the sun or the earth. He could also gain the power of telepathy on a large scale, being able to communicate with anyone in the world or even across different dimensions. Additionally, he might obtain the power of instant teleportation to any place he desires, which would give him a huge advantage in battles and travels.
Well, in some fanfics, Naruto's death could be like a sacrifice that unlocks some hidden or ancient power. Maybe his death releases a special chakra that was locked within him, and this chakra then transforms into new, more powerful abilities. It could also be that his death is part of a prophecy, and upon his death, a deity or some other powerful entity grants him powers as a reward for his selfless act of sacrificing himself.
In fanfiction, if Naruto had a wasp bloodline, he could have some really interesting powers. For one, he could develop the ability to build structures like wasps build their nests. This could be used as a form of defense or even a trap for his enemies. He could also have a form of group communication, similar to how wasps communicate within their colonies. His body could become more adaptable to different environments, like wasps can survive in various habitats. And his chakra could take on new properties related to the wasp's characteristics, such as a buzzing effect that could disrupt an enemy's chakra flow.
Well, it could be something like the ability to control elements in a completely new way. For example, instead of just the basic five elements in Naruto, the new bloodline might allow for the manipulation of light or dark energy. Maybe it gives the power to teleport short distances instantly, which would be a huge advantage in battles.
Some fanfictions have Naruto getting super powers as a result of a divine intervention. Maybe the gods or goddesses of the Naruto universe see his great potential and decide to give him additional powers to help him in his quest to bring peace. This can lead to all sorts of interesting plot developments, like him having to prove himself worthy of these powers to the divine beings or facing the envy of other ninjas who don't have such divine blessings.
Naruto could use his Rasengan with Superman's strength. Imagine the power of a Rasengan thrown with Superman - level force. It would be extremely destructive.
Some fanfictions might give Naruto the power of elemental fusion. He could combine fire, wind, water, earth, and lightning in ways that are not possible in the original series. This would make his attacks extremely powerful and unpredictable. For instance, he could create a storm of lightning - infused water that not only electrocutes his enemies but also drowns them.
It's possible he gains enhanced physical abilities like super strength or speed. Since his heritage is often tied to some special genetic traits, these could be unlocked upon the revelation. For example, if his heritage is linked to a powerful clan, he could inherit their natural combat prowess. He could also find out about special chakra control abilities that are exclusive to his bloodline, which would give him an edge in battles.
He might gain a more powerful form of Rasengan, like a Rasengan that can change its shape and properties according to the situation. Maybe he has better control over his Nine - Tails chakra and can use it in more creative ways without losing control.
One potential power could be the ability to manipulate fire in a unique way. The Kyuubi has a lot of raw power and in a fem form, it might manifest as a different type of elemental control. Naruto could use this newfound power to create more powerful fire - based jutsus or even combine it with his existing techniques in a more effective manner. Another power might be enhanced speed. The Fem Kyuubi's bloodline could give Naruto the ability to move at blinding speeds, making him a more formidable opponent in combat.
He could develop the ability to combine his chakra with Superman's powers. For example, he might be able to use his Rasengan while flying at super - speed. Or he could infuse his chakra into his heat vision to make it even more powerful.