One idea could be to create an alternate version where a new, mysterious guild enters the Grand Magic Games. This guild could have unique magic that no one has seen before, which would add an element of surprise and intrigue. For example, they might have magic related to time manipulation, allowing them to rewind or fast - forward events during the games.
Another idea is to focus on a particular character's backstory during the Grand Magic Games. Say, for Gray. You could explore his past more deeply while he's competing. Maybe there are some unresolved issues from his childhood that resurface during the games, affecting his performance and his relationships with his guildmates.
You could also write a fanfiction where the rules of the Grand Magic Games are completely changed. Instead of the usual battles and challenges, it becomes a quest - like competition where teams have to solve riddles and find hidden artifacts across Fiore. This would force the characters to use their magic and wits in different ways.
One idea could be Natsu getting a new, powerful form during the Grand Magic Games. This form could be a result of some ancient magic he discovers. He then uses this form to defeat a really tough opponent and surprises everyone, including his guildmates.
In this fanfiction, perhaps the Grand Magic Games are altered due to the presence of Naruto characters. For example, there could be new events that test both ninja skills and magic. Sasuke could use his Sharingan to counter some of the illusions created by Fairy Tail mages. And characters like Erza would be intrigued by the different fighting styles of the Naruto universe, leading to some epic battles and exchanges of techniques.
An interesting plot could involve an OC who is actually from a long - lost guild that has a deep connection to the origins of the Grand Magic Games. The OC enters the games with the secret mission of uncovering the truth about their guild's past. As they compete, they start to notice strange things going on behind the scenes that seem to be related to their guild's history. They have to balance their search for the truth with their performance in the games.
One idea could be a character from a different guild who has a hidden power enters the Grand Magic Games and disrupts the usual dynamics. For example, a young mage with the power to control time but doesn't know how to fully use it yet. This could lead to some really cool and unexpected battles and alliances.
Perhaps a character from a small and unassuming guild has a hidden power that is awakened during the Grand Magic Games. This power could be related to an ancient magic that was thought to be lost. The character then has to learn to control this power quickly while also dealing with the pressure of the Games and the attention it brings from other guilds.
A great plot twist could be that Natsu loses his magic power right before a crucial match in the Grand Magic Games. But then he discovers a hidden reserve of power within himself, perhaps related to his past or his dragon heritage. This new power allows him to come back stronger and win the match in an unexpected way.
Happy could be an unexpected hero. Usually seen as a sidekick, in a fanfiction, he could suddenly discover a new form of magic. Maybe he unlocks a powerful transformation that gives him the ability to take on powerful opponents. He could use his speed and newfound strength to turn the tide in the games.
In a 'Fairy Tail' fanfiction without the Grand Magic Games, the plot could shift towards more cooperation between guilds. Instead of competing in the games, Fairy Tail could team up with other guilds to face a common threat that they previously ignored due to the focus on the games. This could lead to interesting character interactions, new friendships, and alliances. Also, the lack of the games could mean that the guild masters have more time to strategize about the overall state of the magical world and how to protect it from emerging dangers.
Another interesting plot could be a young wizard who is initially not good at traditional magic but has a natural talent for music magic. They struggle to be accepted in the Fairy Tail guild at first because their magic is so different. However, as they grow and develop their skills, they end up saving the guild from a powerful enemy using their music magic in a very unexpected way.
A fanfiction could center around a young wizard who is a master of sand magic but comes from a far - off land. They join Fairy Tail to learn more about their magic and end up getting involved in all sorts of adventures, using their sand magic to create unique defenses and attacks. Their sand magic could also have the ability to transform into different shapes, like sand dragons, which adds an interesting element to the battles in the story.