In the 'nalu igneel meets his grandkids fanfiction', Igneel could be a strict but loving grandparent. He could train his grandkids in the ways of the dragon, making them stronger and more confident. And he might also introduce them to the magical world he comes from, showing them all the wonders and dangers there.
When Igneel meets the guild in fanfiction, there are numerous possibilities. Firstly, there could be a cultural exchange of sorts. Igneel, with his different background, could introduce new ways of thinking and magic. Secondly, he might get involved in the guild's internal politics. He could help resolve disputes or support certain leaders within the guild. And finally, his arrival could attract unwanted attention from other forces, leading to a new wave of challenges for the guild.
A group of rogue dragon slayers who have turned to the dark side could be the main antagonists. They envy Igneel's relationship with Natsu and Fairy Tail. They believe that dragons should rule over humans and plan to use their powers to subjugate the world. Igneel and Fairy Tail must stop them.
One idea could be that Igneel appears in a time when Fairy Tail is facing an enemy they can't defeat. Igneel's power and wisdom help turn the tide. For example, he could teach Natsu some new and powerful dragon slaying magic that Natsu then uses to overpower the foe.
Perhaps it's a fictional adventure story. Mayor West might be spinning a yarn about a magical land he once visited in his dreams. He could be telling his grandkids about the strange creatures he met there and the quests he had to go on. Another possibility is that he's sharing a family legend, like how their family came to live in the town they're in now.
One significance could be the emotional boost for Natsu. After so long without Igneel, having him back would be a huge source of comfort and strength. Natsu could become even more determined in battles.
In a 'naruto is igneel fanfiction', perhaps Naruto is transported to a world where Igneel exists. There, Igneel sees Naruto's potential and decides to train him. Naruto has to adapt to this new world and its rules while learning from Igneel. He could gain dragon - like powers, which he then combines with his ninja skills to face new and more powerful enemies.
One moral lesson could be about kindness. If the story involves helping others in the community, like when Mayor West helped an old lady cross the street or provided food for the needy, he's teaching his grandkids to be kind.
I'm not sure if there is a specific fanfiction with the exact title 'naruto is igneel fairy tail fanfiction'. Fanfictions can be quite diverse. It might be a very creative crossover where the author imagines Naruto in the world of Fairy Tail with a connection to Igneel. Maybe Naruto has some of Igneel's powers or characteristics in this fictional scenario.