Well, first of all, it would likely change Naruto's entire life trajectory. If the Juubi is sealed in his younger self, he would face much greater challenges and also opportunities. He might be seen as a threat by some in the village initially. However, with the power of the Juubi, he could potentially train faster and become even stronger. He could also use this power to better understand the secrets of chakra at a younger age, which might rewrite the relationships he has with his friends and mentors.
In this kind of fanfiction, it could lead to some really interesting power dynamics. Naruto might gain new abilities or have a different understanding of his powers at a younger age. Maybe he could use the power of the Juubi to protect the village in ways he couldn't before in the original story.
The situation in this fanfiction would be complex. Naruto's younger self may not be fully able to control the power of the Juubi at first. This could lead to some chaotic situations in the village. But on the positive side, it could also mean that he has an edge in battles against future enemies. For example, against stronger opponents like Madara or Kaguya, having the Juubi sealed in his younger self could give him the strength to face them earlier. And this might also change the way he is perceived by the shinobi world. Instead of being just a loud - mouthed underdog, he would be a powerful entity with a great responsibility from a very young age.
Chapter 238, "The Guests Were Dumbfounded, The Audience Was Excited", is the clearest early answer because it turns Jiang Yan's situation into a concrete plot event. Early on, Jiang Li was actually first on all three leaderboards?!. By the end, And, to Zhou Xu's alarm, they did find a problem..
Chapter 422, "The Watch Was a Gift from Him", is the clearest early answer because it turns Gift's situation into a concrete plot event. A useful checkpoint is the way the scene starts with Seeing that no voice came from the watch to stop them, the captain of...
Chapter 258, "Explosive! Jiang Li and Director Sun Are Having an Affair!", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Just when everyone in the livestream room was immersed in the lively...
Chapter 167, "Roommates Became Fans of Jiang Li after a Variety Show?!", is the clearest early answer because it turns Shu Yan's situation into a concrete plot event. It opens with By the experimental field, Qi Tianyu was quite helpless as he watched...
Chapter 330, "Why is it her?!", is the clearest early answer because it turns Director Zhang's situation into a concrete plot event. The chapter turns that into something concrete by moving from Of course," Ye Chu pulled a lipstick out of her purse and started...
Chapter 159, "The Other Flying Guest is Actually Him?!", is the clearest early answer because it turns Su Yinwan's situation into a concrete plot event. It opens with Seeing the red light of the camera turn on, Su Yinwan looked at the...
Chapter 234, "Chasing Wind Youth", is the clearest early answer because it turns Mr's situation into a concrete plot event. Early on, Given the vast mystical powers Jiang Li had displayed before, he was.... By the end, His voice, intermittent and broken, came through the earpiece:....
Chapter 278, "Who Are These People Who Idolize Jiang Li?!", is the clearest early answer because it turns Lu Xingchao's situation into a concrete plot event. Early on, People from the fan club also got word that Jiang Li was soon to....
Chapter 577, "Cat and Mouse Game", is the clearest early answer because it turns Jiang Li's situation into a concrete plot event. It opens with Chen Manman also agreed with what Luo Xuan said. and closes on What is this?" Guo Xing looked at the odd name..
Chapter 395, "She's Not Trying to Use Under-the-Table Tactics, Is She?", is the clearest early answer because it turns Zhang Cheng's situation into a concrete plot event.