Perhaps in the fanfic, a young shinobi manages to infiltrate the Five Kage Summit and has a significant impact on the discussions. This shinobi could bring new ideas or warnings that change the course of the kages' decisions. For example, he might have uncovered a plot by a rogue ninja group to take advantage of the kages being gathered in one place. This would not only create tension between the kages and the external threat but also among the kages themselves as they debate how to handle this unexpected situation.
Another plot could be that there is a curse placed on the summit location which starts affecting the kages' judgment. As a result, they start making uncharacteristic decisions. This would lead to chaos and power struggles within the summit. Each kage would be trying to figure out what is wrong while also dealing with the political and diplomatic aspects of the summit.
In a 'naruto five kage summit fanfiction', a great plot could be that the Mizukage reveals she has evidence of a traitor among the other Kages' entourages. This leads to a tense investigation during the summit, with accusations flying and old grudges resurfacing. The story could explore how the Kages balance their trust in their own people and the need to maintain diplomatic relations during such a crisis.
It could be Naruto himself. Since he has a connection to all the villages in some way, he could play a crucial role in the fanfic, perhaps as a mediator or someone who uncovers a hidden conspiracy during the summit.
A plot could revolve around a mysterious threat that targets the Kages during the summit. It could be a long - forgotten enemy or a new dark force. The Kages have to put aside their differences and work together to face this threat. They might also discover some secrets about their own villages in the process of fighting this common enemy.
In this fanfiction, Naruto might be pushed to attack the Five Kage Summit due to some misinformation or a threat he perceives to Konoha. Maybe he thinks the Kages are planning something against his village.
Sasuke could be one to stop Naruto. They have a complex relationship and Sasuke might understand Naruto's motives and be able to talk him down.
It could be a rogue ninja who has a vendetta against all the villages represented at the summit. He might have been wronged in the past by the combined actions of the five great villages and now seeks revenge. He could use the chaos of the summit to launch attacks and try to undermine the stability of the shinobi world.
One idea could be a secret alliance formed during the Kage Summit that was not in the original story. Maybe a Kage has a hidden agenda and is secretly working with an enemy of the village. For example, the Mizukage could be in cahoots with a rogue ninja group to gain power over the other villages.
A new, young ninja from a minor village could be the main character. They could be trying to make a name for themselves and their village at the Kage Summit. They might get involved in some political intrigue or even a fight between the Kages and prove their worth.
In this fanfiction, perhaps Naruto becoming a Kage before the summit means he has to face political challenges early on. He might have to deal with other villages' representatives who are skeptical of his young age and inexperience. He could use his unique ninja way and his strong bonds with his friends to win them over.
In the fanfic, Naruto being cold after the Kage Summit could lead to some interesting character developments. His friends might be worried about him and this could strengthen their bonds. Also, it could be a sign of some sort of new power or curse that he got during the Summit, which would then drive the plot forward as they try to figure out what's wrong with him.