I think Zeno would be a really tough opponent. Zeno has the power to erase entire universes, and a Goku and Goku Black fusion, despite being extremely powerful, would have a hard time against such a being with god - like powers.
I'm not a fan of web novels. I'm just a fan of web novels. I can't provide any information about Naruto. If you have any other questions, I will try my best to answer them.
In Naruto fusion fanfic, the crossovers of settings are really special. If it's a Naruto and Harry Potter fusion, the Hogwarts school and the Hidden Leaf Village are two very different places. Writers get to explore how the rules of magic in Harry Potter's world would work in the ninja world, like if a wizard tried to use a spell on a ninja. Also, new character relationships are formed. Naruto could become friends with Harry Potter, and they could learn from each other's strengths.
Han Li's novel,"Mortal Cultivation Legend", chapter 1260:
While waiting for the TV series, he could also click on the link below to read the classic original work of " The Legend of Mortal Cultivation "!
In that fanfiction, it might be designed that way. Naruto has incredible powers in his own series, like his various jutsu. If translated into the Fairy Tail world in fanfiction, his skills could potentially make him very powerful. But it also depends on how the author of the fanfiction interprets and balances the power systems of both universes.
In fanfiction, a Naruto and Goku fusion could be extremely powerful. They both have unique abilities. Naruto has his ninja skills like shadow clones and Rasengan, while Goku has his Super Saiyan forms and Kamehameha. The fusion might combine Naruto's strategic thinking as a ninja with Goku's straightforward combat style. It could result in a character who can quickly assess a situation like Naruto and then attack with overwhelming power like Goku.
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.
One unique feature is the combination of different power systems. Naruto has chakra and ninja techniques, while Digimons have their own digital powers. In these fanfics, seeing how these powers blend, like Naruto using Rasengan with a Digimon's attack, is really cool.
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.
One common theme is power. Since Naruto and Sasuke both have very distinct and powerful abilities, when they fuse, the exploration of that new, combined power is often a central theme. Writers like to show how this power can be used to face new threats in the Naruto world.