It could be about a fan - made story that combines Naruto with a hundred other elements from different universes or stories. For example, it might crossover Naruto with other popular anime like One Piece or Bleach, or even with elements from Western fantasy stories.
Since it's a crossover, Naruto is likely to be one of the main characters. But depending on what it's crossed with, there could be other main characters from the other universes too. For example, if it's crossed with Harry Potter, Harry Potter could also be a main character.
In a Naruto - Skullgirls fanfiction, Sakura could team up with one of the Skullgirls. Sakura's medical ninjutsu combined with the brute force of a Skullgirl character would make a formidable duo. They could go on adventures together, facing off against common enemies. It would also be fun to see how the two different art styles blend in the fanfiction, like Naruto's more traditional anime look with the unique, somewhat gothic style of Skullgirls.
One possible scenario in a Naruto - Kaneki fanfiction could be that Kaneki somehow ends up in the Naruto world. Maybe through a strange portal or some sort of jutsu gone wrong. He might initially struggle to adapt to the different environment and the presence of chakra. But his own unique kagune abilities could be seen as a strange new form of power in the Naruto universe.
A Naruto and Albedo fanfiction crossover could be really interesting. They are from different fictional universes, Naruto from the ninja - filled world of Hidden Leaf Village and Albedo from the more fantastical world of Genshin Impact. In this fanfiction, perhaps they could meet through some sort of interdimensional rift. Naruto's skills as a ninja, like his shadow clone jutsu, could be a source of amazement for Albedo, who is more into alchemy and magic in his own world. They could team up to face a common enemy that somehow threatens both of their worlds, learning from each other's unique abilities along the way.
One possible fanfiction could be about Naruto and Kuroka teaming up on a mission. Maybe they are in a world where different anime universes collide. Naruto's skills in combat and his never - give - up attitude could be combined with Kuroka's unique powers to defeat a common enemy.
Some fanfictions might focus on the relationships in Naruto. There could be stories exploring Naruto's friendship with Sasuke in a different light. Maybe they have adventures together that are not part of the original plot, like traveling to a new and mysterious land within the Naruto universe to solve a problem that threatens both Konoha and the world.
Well, a really cool concept could be a villain that threatens both the Naruto and DBZ universes. So, characters from both sides have to team up to defeat this powerful foe. Imagine Vegeta and Sasuke having to work together, despite their initial differences. Also, there could be a story where the Dragon Balls are somehow transported to the Naruto world, and Naruto and his friends try to figure out what they are and how to use them.
It's highly unlikely. In the Naruto universe, they don't really have the concept of fanfiction as we do in our world. Their focus is more on real - life ninja activities, training, and village affairs.
I'm not sure if there is an exact fanfiction titled 'naruto is this a zombie crossover fanfiction'. There are countless fanfictions out there, and it could exist, but without searching specific fanfiction platforms, it's hard to say for certain.