It depends on the specific fanfiction, but it could be gods like Amaterasu, a major god in Japanese mythology. Maybe also Susanoo, known for his power and might. Another could be Tsukuyomi, with his control over illusions. These are just some of the possible gods based on the existing mythology that could be incorporated into the fanfiction for Naruto to challenge.
One exciting plot point could be Naruto unlocking new and powerful jutsu specifically for the battles against the gods. For example, he might combine his Rasengan with some divine - like energy he discovers. Another could be the interaction between Naruto and the god - like beings. Maybe he tries to understand their motives and in the process, finds a way to outwit them. And the final one could be when Naruto has to face the most powerful god, where he uses all his skills, friendships, and the power of the ninja world to stand a chance.
It could be the Sage of Six Paths. Since he is a very powerful and almost god - like figure in the Naruto universe. He might have decided to take Naruto under his wing to further his growth.
Maybe the gods are some of the tailed beasts in a more divine form. Since they are powerful entities, they could raise Naruto, teaching him how to better control the power of the Nine - Tails within him and also how to communicate with other tailed beasts on a more spiritual level.
Yes, it can be quite popular. Many fans like to explore the concept of Naruto reaching a god - like status in fanfiction. It allows for creative and often epic storylines that deviate from the original plot, attracting those who want to see Naruto in a more powerful and divine role.
One challenge is combining the two very different universes of Naruto and Fairy Tail (where Juvia is from). The power systems are quite distinct. For instance, Naruto has chakra and Jutsu, while Juvia has water - based magic. Writers need to find a believable way to make these interact. Another issue could be character consistency. Naruto is known for his energetic and determined nature, and Juvia has her own unique, love - stricken yet strong - willed personality. Keeping them in character while creating new situations for them can be tough.
Well, first of all, you need to have a good understanding of both Naruto's world and the world of the other series you're crossing over with. Let's say it's a Naruto and Final Fantasy crossover. You need to know how the magic and summons in Final Fantasy work, and how to integrate Naruto's ninja techniques. Also, pleasing fans of both series can be difficult. Fans of Naruto might have different expectations compared to fans of, say, the Witcher series when you do a crossover. You have to find a balance so that both groups of fans can enjoy the fanfiction.
One challenge is making the two universes blend well. Naruto's world has ninjas, chakra, and different clans, while Misty is from a world full of Pokémon. You need to find a logical way to connect them.
Character development can also be difficult. Since the two series have very distinct character personalities, when bringing Naruto characters into the Shadowhunter world or vice versa, the writer has to ensure that they still stay true to their original selves while also adapting to the new environment. For instance, Naruto's upbeat and determined nature might clash with the more somber and duty - bound Shadowhunters at first.
Another problem is creating a believable plot. Since the two stories have different storylines and themes, coming up with a plot that can incorporate elements from both in a logical and interesting way is not easy. It has to be something that fans of both series can enjoy and not seem forced. For instance, if you want to have a battle in the fanfiction, you need to consider how the Divergent characters' skills and the Naruto characters' jutsu would interact.