Perhaps a plot where the Anbu and Fairy Tail characters swap abilities or powers for a time. The Anbu would have to use Fairy Tail magic in the Naruto world, and the Fairy Tail mages would have to rely on ninja skills. This would lead to some really unique and humorous situations. Also, a story about a hidden connection between the Anbu organization in Naruto and a secret group in Fairy Tail. They discover that they have a common origin or purpose that has been long forgotten, and they must work together to uncover the truth and face the threats that come with this discovery.
One interesting plot idea is the exchange of powers. For instance, if Batman were to somehow gain the ability to use Fairy Tail magic, it would completely change his combat and detective approach. He could use magic spells to enhance his gadgets or solve mysteries in a more magical way.
Another interesting plot could be the Legend of Zelda characters getting lost in the Fairy Tail world. They have to adapt to the new environment, make new friends, and figure out how to get back home. Along the way, they discover new things about themselves and their own powers. It's like a fish - out - of - water story but with the added bonus of magical elements from both universes. This type of plot can be used to introduce Zelda fans to the world of Fairy Tail and vice versa in a really engaging way.
A plot could involve a powerful dark force threatening both the Naruto and Fairy Tail universes. This force could be something that neither ninjutsu nor magic can easily defeat. So, the characters from both worlds must come together. The GMG could be a platform where the first interactions occur. Maybe some Naruto characters enter the GMG under false pretenses to investigate this new threat that seems to be related to the event.
One idea could be that Naruto characters end up in the Fairy Tail world and have to participate in the Grand Magic Games. They could show off their ninja skills which would be a novelty there. Another could be a team - up where Fairy Tail mages and Naruto ninja join forces to fight a common enemy that threatens both their worlds, like an ancient evil that can travel between dimensions.
One idea could be a crossover where a powerful Naruto villain somehow ends up in the Fairy Tail world and causes chaos. The Fairy Tail mages would have to use their unique magic to combat the ninja - like abilities of the Naruto character.
One idea could be that the Fairy Tail guild travels to the Naruto world somehow. They could team up with the ninja to fight a common enemy like a powerful dark magic user who has also invaded the ninja world. Maybe Natsu's fire magic could be compared and combined with Sasuke's fire jutsu in some unique ways during battles.
Maybe there could be a plot where a powerful villain from the Naruto universe, like Orochimaru, teams up with a dark mage from Fairy Tail. The combined threat forces the heroes from both worlds to work together. The Fairy Tail members would be amazed by the unique abilities of the ninja, like Sasuke's Sharingan and its various powers. In turn, the Naruto characters would be intrigued by the wide array of magic in Fairy Tail, such as Erza's Re - Quip magic.
Well, one interesting plot point is often the power clashes. For example, when Naruto's ninja techniques meet Fairy Tail's magic and Irene's dragon - slayer magic. It creates a really cool dynamic of different powers interacting.
A great plot twist would be if the Fairy Tail guild members were transported to the Naruto world and had to adapt to ninja life. Or perhaps a character from Naruto, like Sasuke, gets corrupted by the dark magic in the Fairy Tail world. It would create a whole new dynamic as the other characters try to save him. Also, what if there was a prophecy in both worlds that the only way to save them was for a Fairy Tail wizard and a Naruto ninja to sacrifice themselves? That would be a very intense plot twist.
One idea could be a crossover where Naruto characters learn magic from Fairy Tail. For example, Naruto might learn fire magic and combine it with his Rasengan. Another idea is that the guilds in Fairy Tail and the villages in Naruto have to team up to fight a common enemy, like an ancient dark force. And perhaps some of the Fairy Tail wizards could teach the ninja in Naruto about the power of friendship and how it can enhance their abilities.