Another plot could revolve around a power struggle within Fairy Tail itself over the Heart of Fire. Some members might think it's too dangerous to keep and want to destroy it, while others believe it can be harnessed for good. This could lead to internal conflicts and alliances being formed.
One idea could be exploring a new character who has a unique connection to the Heart of Fire. Maybe they are from a long - lost tribe that was once the guardian of it. They come to Fairy Tail seeking help to protect the Heart of Fire from an ancient evil that has awakened and wants to use its power for destruction.
A really interesting plot would be if the world of the fanfiction was facing a threat that only the fire dragon powers could stop. But the catch is that the current fire dragon slayers have to combine their powers in a way they've never done before. They would have to overcome their differences and learn to work together, all while dealing with the increasing danger to their world.
One idea could be a story where a character has the power to control both fire and water, which is unheard of in the Fairy Tail world. This character could be an outcast at first but then becomes a key figure in a big battle against a powerful dark force.
One idea could be exploring the backstory of a minor character in the 'Fairy Tail Heart of Gold' world. Maybe a character who was only briefly mentioned but has a really interesting past that could be delved into. Another idea is to create an alternate universe where the events of the story took a different turn, like if the main villain in 'Heart of Gold' had a change of heart much earlier in the story.
One idea could be a new character arriving at Fairy Hills and having to adapt to the unique living situation. They could face challenges like getting along with the different personalities of the Fairy Tail mages living there.
Another plot could involve Bardock having to adapt to the magic - based society of Fairy Tail. He might initially struggle with understanding how magic works, but then discovers a way to combine his Saiyan power with the magic there. For example, he could learn to use ki - based attacks in harmony with Fairy Tail's elemental magics. This would create a unique fighting style that surprises both his allies and enemies.
One idea could be a crossover adventure where characters from Fairy Tail and Negima team up to fight a common, powerful enemy. For example, they might face a dark wizard who has the ability to steal magic from both worlds.
One idea could be that the main couple from Fairy Tail goes on a honeymoon to a magical island. There, they discover a hidden ancient magic that they have to protect from villains who also find out about it. Another plot could involve them facing relationship challenges during the honeymoon, like misunderstandings due to magic gone wrong. For example, a spell makes one of them forget parts of their relationship, and they have to work through it to rekindle their love.
In a 'Fairy Tail WW2 Fanfiction', a possible plot could be that the guild discovers a hidden magical dimension that is somehow connected to the events of WW2. They enter this dimension to try and stop a dark force that is influencing the war from the shadows. Some of the characters could form alliances with real - life military personnel who are open - minded enough to accept their help. This would lead to interesting interactions between the magical and non - magical worlds during the war.
One idea could be exploring how the next generation of Fairy Tail wizards handle a new dark guild threat. They might have to combine the old and new magic techniques they've learned.
One idea could be that Luffy joins the Fairy Tail guild and his rubber powers amaze everyone. He might participate in a guild - wide competition and use his unique abilities to win in unexpected ways. For example, stretching to reach far - off targets or bouncing around the arena to dodge attacks.