In many 'naruto fights akatsuki fanfic', one of the best moments is when Naruto first uses a new jutsu against an Akatsuki member. It's a moment of great surprise and power.
Sakura and Sasuke would likely be his allies. They have been through a lot with Naruto and would stand by him. Also, some of his old friends from the Hidden Leaf like Shikamaru and Kiba might join in. They have always supported Naruto in the past and would do the same in this situation.
It could be an unknown brother that was kept secret all this time. Maybe he was hidden away by some enemy of the village and trained to be a powerful adversary for Naruto.
Naruto's Rasengan would be a key skill. He might start with a basic Rasengan and as the fight progresses, he could develop it into a more powerful form like the Big Ball Rasengan. His shadow clone jutsu would also play a major role. He could create a large number of clones to surround Tsunade, confusing her and making it difficult for her to target the real Naruto.
Well, I once had a fight with my best friend over a borrowed dress. I lent her my favorite dress for a party, and she returned it with a stain. I was so mad and we had a huge argument. But later we realized it was just a silly mistake and made up.
The fight between Superman and Doomsday in DC Comics is a classic. It's a battle of titanic strength. Doomsday is a nearly indestructible foe, and Superman has to push himself to his limits. The destruction that occurs during the fight is on a huge scale, and the fact that Superman sacrifices himself in the end makes it an iconic fight in the world of fiction.
One common reason is jealousy. For example, if one friend gets a new job or a new partner and the other feels left out or inferior. Another reason can be differences in values. Maybe one friend is very thrifty while the other is a big spender, and this can lead to arguments about how to spend time together, like whether to go to an expensive restaurant or a cheap one. Also, misunderstandings can easily cause fights. A simple comment might be misinterpreted as an insult.
Sakura could play a crucial role. She might use her medical ninjutsu to heal Naruto during the fight, allowing him to keep going when he's on the verge of exhaustion. This way, Naruto can continue to face Madara with full strength.
I think some of the younger ninjas in the village would support Naruto. They look up to him as a role model. Also, those who have been helped by Naruto in the past, like the families of the villagers he saved. They would see that Naruto is fighting for what's right and would stand with him against the council. Additionally, some of the outcast ninjas who feel oppressed by the council's rules might also join Naruto.
His father, Minato, could be one. Maybe there's some time - travel or alternate reality situation where Minato has been corrupted in some way and Naruto has to fight him to set things right.