Perhaps the Gate of Fate has been sealed for a reason, and in the fanfiction, a dark force is trying to break the seal. The Fairy Tail members must discover the history behind the Gate's sealing and find a way to strengthen the seal or face the consequences of the dark force being unleashed. This could involve a lot of research into the ancient lore of the Fairy Tail world, and also some intense battles against the minions of the dark force as they try to protect the Gate.
A great plot could involve the Gate of Fate being a key to a parallel dimension within the Fairy Tail universe. Characters could accidentally open it and find themselves in a world with different magic rules and strange creatures. They would then have to find a way back while also dealing with the new threats and mysteries of this dimension. This would not only test their magic skills but also their ability to adapt and work together as a team, like the Fairy Tail guild usually does.
Well, a cool plot for a 'Fairy Tail x Fate fanfic' might be centered around a powerful magical artifact that exists in both universes. The characters from both series start to search for it, and during their journey, they learn about the similarities and differences in their magic systems. Maybe some of the Fairy Tail wizards get mistaken for Servants at first and have to prove their true identity while also dealing with the various factions in the Fate world.
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.
Natsu could be a great main character. His hot - headed nature and powerful fire magic would make for an exciting adventure around the Gate of Fate. He could be drawn to it by the mystery and the potential power it holds, and his journey to understand and protect or use the Gate would be full of action.
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.