A plot could involve a magical artifact that links the Naruto universe and Padme's universe. Naruto is drawn to this artifact because of its strange chakra signature. When he touches it, he is transported to Padme's world. Padme, being a senator, is intrigued by this strange new person. They form an alliance when they discover that there are dark forces in both their worlds that are connected. They use Naruto's combat skills and Padme's strategic mind to fight against these forces.
Maybe in a 'naruto x padme fanfic', there is a prophecy that states a hero from another world will come to save Padme's world from a great evil. Naruto is chosen as that hero. When he arrives, Padme doesn't trust him at first. However, Naruto's kind heart and determination start to win her over. As they journey together, Naruto discovers new types of chakra in Padme's world, and Padme witnesses Naruto's incredible ninja techniques. Together, they work towards fulfilling the prophecy.
One possible plot could be that Padme somehow gets transported to the Harry Potter universe. She might use her diplomatic skills to try and broker peace between the wizarding world and the Muggle world. And perhaps she could also form an alliance with Harry Potter and his friends to fight against the dark forces in the wizarding world.
One possible plot could be that Naruto is summoned to the Star Wars universe by a Sith or Jedi experiment gone wrong. He lands near Padme's home planet. Padme discovers him and is initially suspicious. But when she sees Naruto's powers, she realizes he could be an asset. Together, they embark on a journey to stop a new threat that is endangering both the Jedi Order and the planets in the Republic. Naruto uses his Rasengan against the droids and Sith warriors, while Padme uses her diplomatic skills to gather allies.
The plot could start with Padme being sent on a diplomatic mission to the Naruto universe. There, she meets Naruto and they form an unexpected bond. As time passes, she discovers she's pregnant. The story could then revolve around how they face the challenges of bringing a child into two very different worlds. Naruto might have to deal with the ninja clans' reactions, while Padme has to consider the political implications in her own galaxy.
A plot could involve Aerith being sent to Naruto's world. She arrives in Konoha and is seen as a strange but kind - hearted foreigner. Naruto, being the curious and friendly person he is, befriends her. He shows her around Konoha and they start to train together. Aerith teaches Naruto some of her magic, like how to use white magic to heal small wounds. In return, Naruto teaches her basic ninja moves like how to climb trees without using her hands. As time passes, they face threats to Konoha together, with their combined skills.
One possible plot could be that Kale is somehow transported to the Naruto universe. She could initially be seen as a strange and powerful newcomer. Naruto, being the curious and friendly person he is, tries to befriend her. They then team up to face a common enemy, perhaps an akatsuki member who has new and dangerous powers. As they fight together, Kale discovers new ways to control her power with Naruto's help, and Naruto learns about Kale's unique abilities and her world.
A plot could be where Calypso is somehow drawn into Naruto's world. Maybe a powerful jutsu gone wrong creates a portal. Calypso, being a powerful figure, is initially confused but quickly adapts. She and Naruto meet and at first are at odds as they misunderstand each other's motives. But as they get to know one another, they realize they can help each other. Calypso could use her magic to assist Naruto in a difficult battle against a new and dangerous enemy in the ninja world, and Naruto could offer his protection and loyalty to Calypso in return.
One possible plot could be that Naruto discovers a wild wolf in the forest. The wolf is injured and Naruto uses his ninja skills to heal it. As the wolf recovers, it forms a bond with Naruto and they start to communicate in a unique way, perhaps through some kind of spiritual connection. Then they team up to face various threats in the shinobi world together, with the wolf's natural instincts and Naruto's jutsu complementing each other.
A great plot might be set during a time of peace in the Hidden Leaf Village. Naruto, now a respected ninja, is often seen around the village. Hana Inuzuka has a pet that goes missing and Naruto offers to help find it. They search all over the village and the surrounding areas. During their search, they share stories about their past, their dreams, and their fears. This sharing brings them closer and they start to develop feelings for each other. Eventually, they find the pet and their relationship has been transformed into a budding romance.
Imagine that the Akatsuki somehow gets involved with the Titans. They see the Titans as powerful weapons or something to be experimented on. Naruto and his friends suspect this and follow the Akatsuki through a strange rift which leads them to the world of Shingeki no Kyojin. There, they meet the characters from the other series. Together, they have to stop the Akatsuki's evil plan which involves using the Titans to take over both worlds. The Scouts are initially suspicious of Naruto and his powers but soon come to respect him as they see his skills in action.
One possible plot could be that Naruto somehow gets transported to the world of KHR. There, he meets the various characters and due to his unique abilities and kind heart, he attracts a group of them, forming a harem. They could go on adventures together, fighting against common enemies from both worlds while also dealing with the complex relationships within the harem.