In this fanfiction, it might start with Jaune as a baby being found by the dragon. As he grows, the dragon imparts its wisdom on him, like ancient languages or secrets of the land. Jaune could also have a special bond with the dragon that allows them to communicate telepathically. His journey could be about finding his place in the world, whether it's among the dragons or with the humans. He might also discover that he has a special mission, something that only he, with his unique upbringing, can achieve.
Maybe there are other magical creatures. Like a friendly sprite that befriends Jaune and helps him understand the more delicate aspects of the magical world that the dragon might not be so good at explaining. There could also be an evil sorcerer who wants to capture Jaune because of his unique connection to the dragon, thinking he can use it for his own dark purposes.
One possible plot could be that Natsu is raised by a dragon other than Igneel. This new dragon might have different values and teachings. For example, if it was a more reclusive dragon, Natsu might be less outgoing and more reserved compared to his canon self. The dragon could also teach Natsu different types of magic, which would change the way he fights and interacts with others in the Fairy Tail guild.
One common plotline could be Jaune having unique training methods. For example, in some fanfictions, he might be trained by a hermit - like figure who imparts special combat skills. Another could be his relationships evolving differently. Maybe he forms closer bonds with certain characters earlier than in the original series due to the altered upbringing in the fan - made scenarios.
One possible plot could be that Jaune discovers he has a daughter in a very unexpected way. Maybe she shows up at Beacon Academy one day, and he has to figure out how she came to be. He then has to balance his duties as a Huntsman with being a father, all while protecting her from the various threats in the RWBY world.
Well, perhaps the plot could involve Jaune trying to train the pet Grimm. He might face challenges from other characters who are against having a Grimm as a pet due to their inherently dangerous nature.
Well, it could involve Jaune using Jedi-like powers in the RWBY universe. Maybe he discovers an ancient relic that gives him the Force and he has to learn to control it while still dealing with the Grimm and his normal RWBY duties.
Well, it could be that Raven takes Jaune on some sort of wacky adventure. Maybe she mistakes him for someone else at first and then they get into all kinds of comical situations as she tries to figure out what to do with him. For example, she might drag him along on a quest that he's completely unprepared for, and his bumbling attempts to keep up make for a really funny story.
One possible plot twist could be that the Dragon Slayer's combat skills and no - nonsense attitude influence Harry in unexpected ways. Maybe Harry becomes more physically aggressive in his defense against the Dark Arts, rather than relying solely on magic. Another twist could be that the Dragon Slayer has secrets about Harry's parents that even Dumbledore doesn't know, leading to a whole new understanding of Harry's heritage.
Maybe it's an ancient and powerful dragon that has been in hiding for a long time. This dragon decides to raise Natsu for some prophecy - related reasons. It could be that the dragon believes Natsu is the key to saving the dragon or human world from a great danger.
It could be about Jaune being transported to the Naruto world and having to learn ninja techniques. Maybe he teams up with Naruto and his friends to fight against a common enemy.