Well, it's quite possible. Fanfiction writers are known for their wild and creative ideas. Since both Naruto and Natsu are from popular anime, some writer might have thought of creating a story where Naruto is somehow related as Natsu's grandfather. But it also depends on how much of the respective anime universes the writer wants to blend and how they would explain such a connection in the story.
Yes, there are likely fanfictions out there with such a concept. Fanfiction platforms are full of creative and often wild ideas. You can check major fanfiction websites like FanFiction.net or Archive of Our Own (AO3). Just search for the relevant tags or keywords to find them.
Yes, there are likely some fanfictions out there with this concept. The 'Naruto' and 'Fairy Tail' (where Natsu is from) fandoms are both quite large, and fans often like to create crossovers that connect different universes in interesting ways.
Friendship is also a big theme. Naruto values his friends deeply, and Natsu is the same in his own way. Fanfictions usually explore how their friendship would develop if they met. They would likely bond over their shared love for a good fight and protecting their loved ones. For example, they might team up against stronger enemies that neither could face alone.
In addition to Naruto and Natsu, there could also be other important characters. For example, Sasuke from Naruto's world might make an appearance if there's a connection between the two worlds. From Fairy Tail, characters like Lucy could also be involved as she often teams up with Natsu. They could all interact in various ways, depending on the plot of the fanfiction.
Well, it could be about Naruto somehow ending up in the Fairy Tail world and meeting Natsu. Maybe they team up to fight a common enemy. Naruto's jutsus and Natsu's dragon slayer magic could combine in interesting ways during battles.
Natsu could inherit the ability to use chakra. This would give him an extra edge in combat, allowing him to perform jutsus like Naruto. Maybe he could even learn the Rasengan, which he could combine with his fire magic for a super - powerful attack.
Maybe they embark on a journey to save their respective worlds from a common threat. A powerful demon or an evil wizard is trying to destroy both the Naruto universe and the Fairy Tail world. Naruto and Natsu would travel across different dimensions, gathering allies from both worlds. Naruto would use his Rasengan and Natsu his Fire Dragon's Roar to fight off hordes of minions while they search for a way to stop the main villain.
Natsu's fire magic could enhance Naruto's fire - based jutsu. For example, if Naruto uses his Fireball Jutsu, Natsu could add his own magical fire power to make it even more powerful. Also, Naruto's shadow clones could be used in interesting ways with Natsu's fighting style. Natsu could use the clones to his advantage, like having them distract an enemy while he charges in with a powerful fire punch.
It could be a very strange or misconstrued statement. Naruto and Natsu are from different fictional universes. Maybe it's a very creative or confused idea where someone is imagining a crossover in the form of fanfiction that combines elements of Naruto and Natsu in a way that reading Naruto is seen as part of a Natsu - related fan - created story.