Another fanfiction could involve a situation where Azula is transported to the Naruto universe. She might mistake the lava - based attacks in the Naruto world as some advanced form of firebending. Naruto and his friends would be both curious and cautious about this powerful newcomer with her unique abilities related to fire and Naruto's lava - like jutsu could play a role in their interactions.
A more complex fanfiction could be set in a post - war scenario in both universes. Naruto is trying to rebuild his village and Azula, having redeemed herself, wants to use her knowledge of fire (and perhaps an adapted form of lava - like powers she learned from Naruto's world) to help. They form an alliance against common threats that require both the skills from the Naruto universe and the bending abilities from Azula's world.
In a fanfiction, Azula could be transported to the Naruto world. The Sharingan users would be very interested in her abilities as she is a powerful firebender. Naruto, being the main character, could try to befriend her. He might see her as a lost soul like some of his other friends in the past. The Sharingan could be used to analyze her fighting style and Naruto could learn from it to develop new jutsu. They could team up against common enemies in the Naruto world.
One idea could be a story where a new character with the lava release bloodline enters the Hidden Leaf Village. This character could initially be seen as a threat but later prove to be an ally. They might have unique abilities within the lava release, like creating lava constructs that can be used for both offense and defense.
One idea could be a crossover where Naruto, with his Mokuton abilities, somehow ends up in the Avatar universe and meets Azula. Maybe he tries to use his Mokuton to counter her firebending in a big battle. Another could be a story where Azula discovers a way to use Mokuton-like powers through some dark magic and Naruto has to stop her from misusing it.
In a fanfiction, Naruto might be exploring a new area in his world that has a lot of lava. Azula, who has a natural affinity for fire, could be drawn to this place as well. They could meet and at first be hostile towards each other. But as they learn more about each other's powers, they start to cooperate. For example, Naruto could use his shadow clone jutsu to help Azula practice her firebending in a more complex environment created by the lava, and in return Azula could teach Naruto some advanced heat - based techniques.
One idea could be a story where a young ninja discovers they have the Lava Release ability but it's a rare and feared power in their village. They have to struggle to control it while also facing discrimination from other villagers. As they grow, they meet Naruto who helps them see the potential of their power for good.
Perhaps in the fanfiction, a lava dragon slayer is accidentally transported to the Naruto world. The slayer could team up with Naruto and his friends. They would share their knowledge of lava - based attacks and the slayer could learn about chakra. Together, they could go on adventures, facing off against powerful villains. The slayer could use their unique abilities to help in battles, like melting through strong defenses or creating lava - based barriers.
One idea could be that Azula somehow gets transported to the Naruto universe and is given the power of the Rinnegan. She might use it in her own cunning way, perhaps to gain more power over the Hidden Villages. She could manipulate the new powers with her already devious nature, creating a new and dangerous force in the Naruto world.
Another possibility is that Clayface somehow gets transported to the Naruto universe. The shinobi in the Naruto world would be very confused by his abilities. Clayface could try to blend in by mimicking the appearance of different shinobi, but his lack of chakra would give him away. Naruto might see through his disguise easily due to his own perceptive skills.
One idea could be a crossover where Naruto is transported to Noire's world. He could use his ninja skills to help Noire in her battles against the various threats in her realm. For example, Naruto's shadow clone jutsu could be used to confuse the enemies while Noire attacks from a different angle.
One idea could be a crossover where Naruto and his friends are transported to the Soul Society. Naruto's positive attitude and determination might inspire the Soul Reapers in a new way. He could learn some of their techniques, and in return, teach them about chakra and his own ninja skills.