Perhaps they choose a honeymoon destination that is known for its dangerous magical creatures. They end up having to team up with the local mages to fend off these creatures and in the process, they learn more about each other's strengths and weaknesses. Also, it could be interesting if they stumble upon a prophecy during their honeymoon that involves their future together and the future of Fairy Tail as a whole.
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.
A possible plot is that they go on a honeymoon in a parallel world where Fairy Tail doesn't exist. They have to rely solely on each other and their love to survive in this strange new place. They might meet alternate versions of their friends or enemies, which would add an exciting twist to 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.
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.
Perhaps in the fanfiction, there is a traveling burger - making wizard who comes to the Fairy Tail guild. This wizard has the ability to infuse emotions into burgers. So, a happy burger might make the eater feel extremely joyful, while a sad burger could bring out melancholy. The Fairy Tail members are intrigued by this concept and start to explore how these emotion - filled burgers could be used in their daily lives and in battles.
One idea could be a character from Fairy Tail having to box against a powerful magical opponent where their regular magic is restricted, so they rely solely on boxing skills. For example, Natsu could be in a situation where his fire magic doesn't work, and he has to use his brute strength and newly learned boxing moves to win the fight.
One idea could be a marriage between Natsu and Lucy. They could have a big, magical wedding in Magnolia where all their guild mates are involved. Maybe they face some kind of pre - wedding chaos like an enemy trying to disrupt the preparations but they overcome it together.