A new jutsu could also be a healing jutsu with a twist. Instead of just healing wounds, it could also restore chakra. Naruto has always been about protecting his friends, and this jutsu would be a great addition to his arsenal. He could use it on himself or his comrades during long battles to keep their chakra levels up while also healing any injuries.
He could create a jutsu that allows him to teleport short distances. Given his quick thinking and need for mobility in battles, a short - range teleportation jutsu would be very useful. It could be like a mini - version of Kamui but powered by his own chakra.
He might also draw inspiration from his friends' jutsus. Sasuke has some powerful fire - based jutsus. Naruto could think about how to counter or incorporate those elements. He could try to merge his own wind - style with Sasuke's fire to create a new type of jutsu that has both the intensity of fire and the cutting power of wind.
One possible powerful jutsu he could create is a time - freezing jutsu. This would allow Naruto to stop his opponents in their tracks, giving him the opportunity to either land a decisive blow or set up a more complex strategy. Since Naruto has always been about speed and surprise, this jutsu would add another dimension to his combat style.
A 'Solar - Flare Rasengan'. Naruto could combine his wind - style chakra with some kind of solar - based energy he discovers. This jutsu would be like a super - charged Rasengan that emits a blinding light as well as powerful wind - based damage.
He could create a jutsu like 'Blood Clone Jutsu'. Using Alucard's ability to manipulate blood, Naruto could create clones made of blood that have the same strength and abilities as him. These clones would be more durable than his regular shadow clones and could even explode on contact, causing damage with the blood splatter.
He could create a 'Super - Flight Jutsu'. Since he has Superman's ability to fly, he could combine it with his ninja techniques. Maybe he could make a jutsu where he flies at high speed and creates a shockwave around him to knock out enemies. Another one could be 'Heat - Vision Beam Jutsu', where he focuses his heat vision like a chakra - powered beam.
One possible new jutsu could be a healing jutsu using Quincy powers. Quincy have a connection to spiritual energy which could potentially be used for healing. Naruto, with his big heart and desire to protect, would surely find a way to use this to heal his friends or even himself during battle. He could also create a jutsu that imbues his shadow clones with Quincy powers, making them more effective in combat and able to perform tasks that normal shadow clones couldn't.
He could create an 'Explosive Rasengan'. By infusing the explosive properties of Deidara's bloodline into his Rasengan, it would be a jutsu that not only has the rotational force of the Rasengan but also the explosive power of Deidara's clay. It would be extremely powerful and could cause massive destruction.
One possible new jutsu could be an 'Armor - Boosted Rasengan'. Naruto could use the power - enhancing features of Genji's armor to supercharge his Rasengan. The armor might be able to add an extra layer of energy or stability to the jutsu, making it larger and more destructive. Another idea is a 'Stealth - Dash Jutsu'. Since Genji's armor is often associated with quick and stealthy movements, Naruto could develop a jutsu that allows him to quickly dash and become invisible for a short time, similar to some of Genji's abilities in his own universe.
He could potentially learn the Flying Thunder God Technique. It's a very powerful jutsu that Minato was famous for. Naruto's already fast with his Sage Mode and Nine - Tails Chakra, and this would make him even more formidable in battle.
If Naruto creates a very powerful and dangerous jutsu, some characters might be afraid of him. For example, the villagers who were once suspicious of his Nine - Tails power could again start to fear him. However, his close friends like Sasuke and Sakura would likely trust him and help him control and master the new jutsu.