Back in Chapter 57, the Crown Prince's (Naruto) crisis triggered the Hyuga Clan and Uchiha Clan to scramble over each other to volunteer for battle. His astonishing ability to rally support didn't come out of nowhere, nor was it due to some cheat skill. It was something Naruto earned, step by step, through his actions.
Though the Crown Prince was only three years old, he had already accomplished quite a bit before directly stepping into danger and dealing with Danzo Shimura.
Back when he helped Hyuga Hinata, he was mistakenly believed to be acting on behalf of the Third Hokage due to his status as a Jinchūriki. This misunderstanding inadvertently defused the budding tensions and suspicions between the Hyuga Clan and the Third Hokage.
When he encountered and guided Little Uchiha Fan in training, it not only served as a bridge to meet Uchiha Itachi, which led to gaining his help in approaching Uchiha Fugaku, but also, after revealing his own background, dramatically increased Fugaku's favor toward him—thanks to the unexpectedly deep bond between Minato Namikaze and Fugaku. As a result, he gained Fugaku's trust without much resistance and successfully convinced him to crush any thoughts of rebellion while they were still in the cradle.
All things considered, the reason the Third Hokage, who had previously been somewhat restrained by the Elder Council's sabotage, was suddenly emboldened to confront Danzo head-on and even gain the upper hand wasn't just because his prestige and authority had resurged after three years of recuperation. A large part of it was also due to Naruto acting as a mediator, persuading the two most powerful clans in Hidden Leaf Village to align themselves with him. In other words, the current Third Hokage could be said to command both power and public support. As for Danzo, who still clung to his outdated schemes from three years ago, dreaming of stealing the Hokage seat through deceit and manipulation—how could he possibly not suffer a string of defeats?
And now, the Crown Prince had faintly become the beloved center of the Hokage faction. He was no longer backed solely by the Third Hokage. Now, he also had the support of the mighty Hyuga and Uchiha clans. In this situation, if Naruto wanted to restore his status as the Hero's Son, it would be no difficult task… but the reason he hadn't done so was because Naruto knew that his future enemies weren't limited to just Danzo. He had chosen to keep a low profile on purpose, planning to continue playing the fool in order to take his enemies by surprise in the future. That's why, apart from the Third Hokage, Hyuga Hiashi, and Uchiha Fugaku, no one in the Hidden Leaf Village knew the truth.
In conclusion, while Danzo Shimura thought he'd drawn the ultimate trump card and was feeling smug about it, he had no idea that the Crown Prince was not only not his ace in the hole, but in fact, was a hornet's nest—poke it once, and it would return a thousandfold sting, utterly unmanageable!
…
By the way, when Hyuga Hiashi suddenly rushed in to request battle, both Uchiha Fugaku and the Third Hokage were utterly baffled. If we were to match his internal reaction with an emoji, it would definitely be the iconic Black Guy Confused Face™—question marks and all.
Just as Hiashi hadn't expected that Naruto's importance would be enough to make Fugaku kneel and plead for a rescue mission, Fugaku had no idea that Naruto held enough weight in Hiashi's heart for him to disregard the fact that his sworn enemy was present—going so far as to calmly and sincerely address him as "brother," clearly making a conscious effort to avoid conflict and ensure they wouldn't waste precious time bickering while Naruto was in danger.
Naturally, this unintended but sincere cooperation marked the beginning of a thaw between the two clans. Over time, their relationship would cease to deteriorate and instead slowly—yet genuinely—begin to mend. When Hinata and Sasuke grew up, they would help guide these two powerful forces into becoming Naruto's most solid and unwavering support…
But that's a story for another day.