They might have a new form of the Sharingan - Rasengan combination. The Rasengan could be infused with the power of the Sharingan, making it not only a powerful physical attack but also having some sort of mind - affecting ability. Also, the fused character could inherit Naruto's Sage Mode and Sasuke's Rinnegan, creating an extremely powerful ocular - power combination.
The fusion would probably have enhanced physical abilities. With Naruto's stamina and Sasuke's speed, they could move faster and fight longer. And in terms of ninjutsu, they could combine their elemental jutsus. Maybe create a new fire - wind jutsu from Naruto's wind and Sasuke's fire.
A Naruto - Sasuke fusion could potentially have the ability to teleport in a new way. Combining Sasuke's space - time ninjutsu with Naruto's ability to sense chakra, they could teleport to the location of any chakra signature they sense. Their combat skills would be a blend of Naruto's close - range combat with Rasengan and Sasuke's long - range attacks with his various fire - based jutsus.
In a Naruto - Goku fusion, there could be a new form of energy manipulation. Goku manipulates ki, and Naruto uses chakra. They might create a hybrid energy that has the best of both worlds. This energy could be used for long - range attacks like Goku's energy blasts and also for close - combat like Naruto's Rasengan. Also, the fusion could have enhanced senses, borrowing from Goku's Saiyan senses and Naruto's ninja training.
One potential ability is the creation of highly customized puppets. Naruto could use his knowledge of different ninja techniques to make puppets with special functions. For example, a puppet with the ability to perform Rasengan attacks. Another ability could be his quick - thinking in puppet combat. Since he's already good at adapting in battles, he could control puppets in a very fluid and strategic way.
One interesting concept could be the combined power they would possess. Since Naruto has the Nine - Tails' chakra and Sasuke has the Sharingan and Rinnegan, their fusion might have an incredibly powerful and unique set of abilities. For example, they could create new jutsu that combines Naruto's Rasengan with Sasuke's Chidori in a more powerful and unexpected way.
One interesting concept could be the combined powers they would have. For example, Naruto's Rasengan combined with Sasuke's Chidori might create a super - powerful new jutsu. It could also be interesting to explore how their personalities would blend. Naruto's optimism and Sasuke's brooding nature could result in a complex and dynamic character.
One possible plot could be that they fuse to stop a new and ancient evil that has awakened. This evil is so powerful that neither Naruto nor Sasuke can defeat it alone. So, they decide to perform the fusion dance and then embark on a journey to find the source of this evil and destroy it. Along the way, they face various challenges that test their new combined abilities.
If Naruto and Sasuke had a Potara fusion in fanfiction, their powers would be a blend of their individual strengths. Naruto's ability to use the Nine - Tails' chakra would combine with Sasuke's Sharingan and Rinnegan powers. They might gain the ability to teleport long distances instantly, similar to how Sasuke can with his Rinnegan. Also, their combined combat skills would make them nearly unbeatable in battle, as they could switch between Naruto's close - range, brute - force attacks and Sasuke's more precise, long - range jutsu with ease.
In a Naruto and Sasuke fusion dance fanfiction, it could start with them realizing the need to combine their powers in the face of an extremely powerful enemy. Once they perform the fusion dance successfully, their personalities would also merge to some extent. The new character could have Naruto's friendly and outgoing nature mixed with Sasuke's more reserved and brooding side. Their abilities would be off the charts. For example, they could use the Rasengan and Chidori simultaneously, creating a new and even more destructive attack. And their speed and strength would be enhanced beyond what either of them could achieve alone.
I think Kakashi could be a great character to pair with a Naruto - Sasuke fusion. Kakashi has a long history with both of them and could serve as a mentor or partner in new adventures. He could help the fusion control its newfound power.
For Naruto, he would have to grapple with the fact that he is fighting his former friend. This could make him more solemn and determined. He might develop a darker side as he realizes the seriousness of stopping Sasuke. For Sasuke, he could start as overconfident in his power but as Naruto keeps pushing him back, he could become more desperate and start to question his own motives.
One of the main themes is the exploration of new abilities. The fusion gives birth to abilities that neither Naruto nor Sasuke had alone. Another theme is the concept of balance. Their fusion has to balance Naruto's more optimistic and friendly nature with Sasuke's more brooding and goal - focused nature. And the theme of hope can be seen, as their fusion might be the hope for the ninja world to face a certain doom.