One possible plot could be that Naruto somehow gets involved in the Sekirei Plan while still having the power of the Juubi within him. He might use his ninja skills and the Juubi's power to protect the Sekirei from those who would use them for evil purposes. For example, he could face off against Minaka Hiroto, the creator of the Sekirei Plan, if he discovers that the plan is causing harm to the Sekirei. Naruto's values of friendship and protecting the weak would likely drive his actions in this fanfic scenario.
Perhaps a rogue Sekirei who has been corrupted by the power of the Juubi's energy that has seeped into the Sekirei world. This Sekirei could start causing chaos, believing that they are now more powerful than the others and should rule over them. Naruto would then have to stop this Sekirei from causing more destruction and bring balance back to the Sekirei world.
If Naruto was the Juubi in the fanfic, there would be a lot of changes. First, his physical abilities would be off the charts. He could probably move at incredible speeds and have superhuman strength. His chakra reserves would be massive, which means he could perform powerful jutsu without getting tired easily. Also, the other characters in the story would probably be in awe or fear of him. His friends might try to help him control this new power, while his enemies would be even more determined to defeat him. It could also change the political situation in the ninja world, as having such a powerful being among them would disrupt the balance of power.
It might not be extremely popular. While both Naruto and Sekirei have their own large fanbases, combining them in a fanfiction in this way is a rather niche idea. Many fans of each series are more focused on the original storylines, characters, and lore of their respective shows. However, there are always some fans who enjoy exploring crossovers and unique interpretations, so it could have a small following among those who like to think outside the box in fanfiction.
Well, the world - building in 'naruto sekirei fanfic' can be quite fascinating. The fanfic might blend the settings of the two universes, like the hidden villages from Naruto and the modern - day Tokyo - like setting of Sekirei. This creates a whole new backdrop for the story. Also, the character development is often interesting. Characters from both series can grow and change in ways that are different from their original storylines, which can add depth to the fanfic.
One common theme is the exploration of new worlds. Since it combines Naruto and Sekirei, often Hanabi is placed in the Sekirei world and has to figure out how things work there.
Well, 'Hanabi's Sekirei Adventure' is also a notable one. In this fanfic, Hanabi discovers the Sekirei world and has to adapt to its rules. The author does a great job of portraying Hanabi's growth throughout the story. It has a good mix of the Naruto and Sekirei lore, which makes it a fun read for fans of both.
It depends on how the author writes it. But if Naruto has all his powers and the will to win, he could defeat the Juubi. He has shown amazing growth and power throughout the Naruto series.
Well, perhaps in the fanfic, Naruto has to team up with his friends in a unique way to seal the Juubi. For example, Sasuke could use his Sharingan to help Naruto locate the weak points of the Juubi while Naruto does the actual sealing. And Sakura could use her medical ninjutsu to keep Naruto in top shape during the process.