A plot could involve Naruto and Korra having to compete in a special tournament that combines the fighting styles and abilities of both their worlds. They start off as rivals but gradually learn to respect each other and work together. Or perhaps a story where Korra's connection to the spirit world gets disrupted and Naruto, with his own experiences with spirits, helps her to restore it. This could involve exploring different spirit realms and encountering unique spirits that neither has seen before.
One idea could be a time - travel plot where Korra is sent back in time to the era of Naruto. She has to adapt to the different world and also help Naruto in some way, like against a new threat that she has knowledge of from her own time. Another could be a crossover adventure where they both end up in a strange new dimension and have to rely on each other's skills to find their way back home.
Maybe there's a time - traveling plot where Korra gets sent back in time to Naruto's era. She has to adapt to the different ways there, and Naruto helps her. Along the way, they are intrigued by each other's powers and personalities. They go on adventures together, facing challenges side by side, which leads to a romantic connection.
One idea could be a crossover where Naruto and Korra meet and have to team up to defeat a common enemy. Maybe an ancient evil that threatens both their worlds. Another could be a story about Korra learning some of Naruto's signature jutsu and incorporating them into her own fighting style.
One idea could be a crossover where Naruto, with the power of the Kyuubi, somehow ends up in the world of Legend of Korra. He could team up with Korra to face a new threat that combines the dark jutsu from Naruto's world and the bending abilities in Korra's world.
One possible plot idea could be a crossover where characters from Naruto and Legend of Korra have to team up to face the Juubi. Maybe the Avatar from Legend of Korra discovers a new power that is linked to the chakra of the Juubi in the Naruto world.
One idea could be a story where Naruto and Korra meet in a dimension where the worlds of their respective shows collide. They could team up to fight a new, powerful enemy that threatens both their universes. Another idea is a time - travel story where Korra goes back in time to the Naruto era and has to adapt to the different ninja world while also sharing her bending knowledge.
Perhaps in this fanfiction, Naruto and Korra find themselves in a situation where their pregnancies are part of a prophecy. They then have to figure out how to fulfill the prophecy while dealing with the normal challenges of pregnancy like mood swings and physical discomfort. They could meet other characters from their respective universes who help them on this journey, like Kakashi guiding Naruto on how to be a good father - to - be and Tenzin giving Korra advice on handling her new situation.
One idea could be that the reincarnated character has memories of their past life. They could use this knowledge to predict events in the Avatar world. For example, they might know about an upcoming threat and start preparing for it much earlier than anyone else. This could lead to some interesting interactions with Korra and the other characters as they try to convince them of the danger.
A plot could revolve around Korra and Iroh traveling to different places in search of the best place to raise their child. Along the way, they meet different cultures and learn valuable lessons about family and love. They could also encounter some old enemies who now see their pregnancy as a sign of weakness and try to attack them. But through their combined strength and the love for their unborn child, they are able to fend off the threats and continue on their journey.
One idea could be a crossover with another popular fantasy world like 'Harry Potter'. Korra could end up at Hogwarts and have to deal with magic in a completely new way. Maybe she'd use her bending to enhance or counter some spells.
One idea could be that Ichigo, through some sort of interdimensional rift, ends up in the Avatar world of Legend of Korra. He could initially be seen as a threat due to his otherworldly powers. But as the story progresses, he teams up with Korra to fight a common enemy that is trying to take over both their worlds. His Soul Reaper powers could be used in unique ways, like using his Getsuga Tenshou to blast away dark spirits that are plaguing the Avatar world.