Well, you could write a fanfiction where a new, powerful character joins Tartarus but then has a change of heart. This character could start to secretly help the Fairy Tail members from within Tartarus. They could pass on information about Tartarus's plans and weaknesses. And at the same time, the Fairy Tail members are trying to figure out who this mysterious ally is and how they can fully trust them.
One idea could be exploring the backstories of the Tartarus members in more depth. For example, how they came to join Tartarus and what their initial motives were. Another could be a story where the Fairy Tail members have to infiltrate Tartarus in a very different way, like using magic that disguises them as Tartarus members.
A cool plot could be a time - travel fanfiction related to 'Fairy Tail Tartarus'. What if some Fairy Tail members go back in time and try to prevent Tartarus from ever being formed? They could face challenges like not being able to use their full magic powers in the past and having to rely on the magic that was available at that time. This would also give an opportunity to explore the earlier days of the Fairy Tail guild and how it might have interacted with the precursors of Tartarus.
One interesting Tartarus Fairy Tail fanfiction could be about the characters' journey to overcome the dark powers of Tartarus in a different way than in the original story. For example, a story where they have to form unexpected alliances within Tartarus itself.
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.
Well, it could be about the guild rebuilding and mending the relationships that were strained during the Tartarus arc. Maybe some characters have new powers or a deeper understanding of their magic.
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.
Maybe a mermaid in Fairy Tail fanfiction is cursed. Instead of having a beautiful voice like in traditional mermaid tales, she has a voice that causes chaos when she sings. The Fairy Tail wizards have to find a way to break the curse without sacrificing her powers. They could go on a journey to find a special artifact that can reverse the curse.