The story might progress with Naruto becoming a sort of super - protector. He could use the power of all bijuu to defend the Hidden Leaf Village from any threat.
The story's progression would be quite dramatic. Naruto having all bijuu would make him a target for those who want to control or destroy that power. He would have to constantly be on guard. At the same time, he could use this power to try and unite the ninja world. He might start by sharing the knowledge and power he has gained with his friends and allies, which could lead to new alliances and a shift in the balance of power among the villages. This could also create tension with some who are jealous or fearful of his new - found might.
His power becomes extremely overwhelming. With all nine bijuu, Naruto gains access to an insane amount of chakra. He can perform massive jutsu without much strain. For example, his Rasengan could potentially be magnified to a scale that could destroy large areas with ease. Also, his physical abilities like strength and speed would be enhanced to superhuman levels due to the boost from the bijuu's power.
If Naruto has all bijuu in fanfiction, it's a huge game - changer. Firstly, his training and growth would be on a whole new level. He'd have to learn to balance the different natures and personalities of each bijuu. His opponents would have to come up with new strategies to face him. Moreover, it could open up stories about how he uses the bijuu to bring peace to the ninja world. Maybe he could use their power to stop wars and conflicts, or to protect the weak. It could also lead to interesting interactions with characters like Sasuke, as they might have different views on how to use such great power.
Well, it makes Naruto extremely powerful. He becomes like a force that no one can easily oppose. His chakra level skyrockets, and he can use the unique abilities of each bijuu. This changes the power balance as he can now handle threats that were previously too difficult, like taking on powerful villains single - handedly.
The story might progress with Naruto becoming a sort of super - ninja. He could start by using his new powers to protect the village from threats that were previously too difficult to handle. Maybe he'd face off against an ancient evil that only his combined powers could defeat.
The plot might revolve around how Naruto uses his power to deal with the long - standing problems in the ninja world. He could use it to find a cure for all the ninja - related diseases. And as for the political situation, he could influence the daimyos to make more just decisions for the ninja villages. His relationships with other characters would also change. Some might be in awe of him, while others might be jealous or even afraid.
In fanfiction, if Naruto absorbs all the bijuu, he would likely become an extremely powerful being. His chakra reserves would be off the charts, enabling him to perform incredibly powerful jutsu without much strain. He might also gain new abilities specific to each bijuu, like the ability to control different elements more proficiently or use their unique powers in combat.
Well, if Naruto absorbs all bijuu in this fanfiction, he'd probably be seen as a sort of super - being in the ninja world. His status would change drastically. He might face new challenges too, like dealing with the political unrest that his newfound power could cause. People would either fear him or try to use him for their own gains. And on a more personal level, he'd have to learn to control all that power, which could be a huge struggle, considering the different natures of the bijuu.
In many Naruto fanfictions, if Naruto has three bijuu, they could be the Nine - Tails (Kurama) which he already has in the original series, perhaps the Eight - Tails (Gyuki) as it has a connection with Naruto's world and Akatsuki's hunt for the bijuu. And another could be the Three - Tails (Isobu). However, it really depends on the specific plot and creative direction of the fanfiction.
One storyline could be Naruto using the bijuu powers to unite all the ninja villages. He could show off his power and convince them that working together is better. Another could be him facing off against a new, even more powerful enemy that is attracted by his collection of bijuu. Maybe a powerful demon from another dimension.
One potential plot development could be that Naruto has to face new, more powerful enemies who are drawn to his newfound power. Another could be that he has to learn to control the combined power of all 9 bijuu, which might be a difficult and dangerous process.