What could be an interesting plot for a 'Fairy Tail Infinity War' fanfiction?

Another interesting plot could be that the Infinity Clock is a portal to different dimensions. The Fairy Tail wizards find themselves in strange new worlds every time the clock ticks, and they have to adapt quickly and find a way to return home while also preventing the clock from being misused by villains in these other dimensions.

A possible plot could involve a misunderstanding. A powerful and mysterious magic item is found near the guild. Some members think it should be destroyed immediately as it might be cursed, while others believe it could be studied and used for good. The resulting conflict escalates into a full - blown civil war, with friendships and alliances being tested.

One idea could be that a powerful dark wizard from another dimension arrives in the Fairy Tail world and starts recruiting villains from various guilds to start a universal war. The Fairy Tail members then have to team up with unlikely allies from different magical realms to fight back.

Well, perhaps in the fanfiction, Godzilla is a result of some dark magic experiment gone wrong in the Fairy Tail universe. The guilds have to deal with this giant creature that is causing destruction everywhere. Lucy might use her Celestial Spirits to try and hold Godzilla off while the others come up with a plan. Gray could use his ice - make magic to try and freeze parts of Godzilla to slow it down. And in the end, they find a way to reverse the dark magic and turn Godzilla back to normal or send it away.

A cool plot might be that a dark wizard from Fairy Tail discovers a spell that can open portals to other dimensions and accidentally pulls Inuyasha, Kagome, Shippo, etc. into their world. The Fairy Tail guild decides to help them get back home. But during this time, they realize that there are some similarities between the demons in Inuyasha's world and the dark creatures they fight in their own world. So, they team up. Inuyasha and Natsu could have a friendly rivalry over who is stronger and in the end, they combine their powers to defeat an ancient evil that was awakened by the portal - opening spell.

One possible plot could be that Ben Tennyson, while on a trip with his family, somehow gets transported to the world of Fairy Tail. His Omnitrix malfunctions due to the different magical energies in that world. The Fairy Tail guild members are initially suspicious of him but when they see his alien forms in action against some common enemies like the Dark Guilds, they start to work together. Ben could learn about magic from the guild members and they could learn about his advanced technology.

One possible plot could be Sasuke initially being a bit of an outcast in Fairy Tail because of his brooding nature. But as he goes on quests with the guild members, he starts to open up. For example, he might team up with Natsu for a mission where they have to fight a powerful dark wizard. Through their battles and interactions, Sasuke learns about the power of friendship in Fairy Tail, which is very different from his past experiences in Naruto's world.

One possible plot could be that Lucario, with its aura - sensing abilities, detects a strange magical disturbance in the Fairy Tail world. It travels there and teams up with Natsu. Lucario's combat skills and ability to sense opponents' moves before they happen would be a great asset in battles against powerful dark mages. Together, they embark on a journey to find the source of the disturbance and end up uncovering a conspiracy that threatens both the Pokémon world and the Fairy Tail world.

One idea could be that Zeref and Mavis are somehow trapped in a parallel dimension. In this dimension, they have to work together to find a way out. Along the way, they start to understand each other's pasts and the pain they've both endured. This could lead to a newfound respect between them.

One possible plot could be the characters from Fairy Tail having to survive in a highschool during a zombie apocalypse. They could use their magic powers in unique ways to fight off the zombies and protect their classmates. For example, Natsu could use his fire magic to burn groups of zombies at once.