Since Goten and Trunks have unique powers like fusion, if they go back in time, they could introduce this concept much earlier. This would change the way battles are fought. The Z - fighters could start training for fusion and create new and more powerful fusion forms. Their powers would not only be a physical advantage but also a strategic one, as they could change the way the Z - fighters approach combat in the past.
Their powers are quite strong. They could easily overpower many of the villains in the past. This might lead to a quick end to some threats that were difficult to deal with in the original timeline. For instance, if they faced Frieza in the past, they could defeat him without much trouble, changing the course of the Saiyan story.
Well, they might change some major events. For example, they could prevent a big battle that had a lot of casualties in the original timeline. Maybe they'd help their parents at a younger age, giving them an edge in fights. They could also introduce new techniques to the past, which would change the power balance among the Z - fighters.
Sasuke's Sharingan abilities would also be a game - changer. He could potentially use it to gain an edge in battles or to uncover secrets that were not known in the past. However, if he overuses it, it could also arouse suspicion among the Uchiha clan and other ninja. For example, if he uses his advanced Sharingan techniques to defeat an enemy too easily, it might make people wonder where he learned such skills.
Naruto's powers, especially his Nine - Tails chakra, could have a huge impact. He could use it to fend off stronger enemies much earlier. Hinata's Byakugan would give her an edge in predicting enemy moves. They could use their powers together to change battles that were originally lost. For example, Naruto could use his Rasengan more effectively with Hinata's support and knowledge from the future.
Naruto's power of the Nine - Tails would be a major factor. In the past, the Nine - Tails was feared and hunted. If Naruto shows up with the power under control, it could change how people view the beast. His chakra reserves, which are huge because of the Nine - Tails, could allow him to perform feats that were previously thought impossible in the past, like quickly rebuilding a village or fending off a large - scale invasion on his own.
His super strength could easily disrupt the past. For example, if he's not careful while trying to stop a crime, he might accidentally cause more damage than good. He could break things that were important in the original timeline.
His powers might also influence the people in the past in unexpected ways. Maybe his dark chakra could seep into some characters and start to corrupt them earlier than in the original story. This could lead to new alliances and rivalries forming, completely different from what happened before. For instance, a character who was originally a hero could be turned into a villain because of Dark Naruto's influence.
His super strength could accidentally cause destruction in the past. For example, if he's not careful while saving someone, he might break a building that was historically important. His spider - sense could also give him an unfair advantage in situations where he shouldn't have such an edge, like in a simple street fight in the past.
Their relationship could also become more of a mentor - mentee type situation at times. If they travel to a time when one of them has more knowledge about what's going on, say Trunks if they go to a time related to his future knowledge, he could be like a mentor to Goten, guiding him through the situation. But then in other situations, Goten's natural fighting instincts might lead and Trunks would learn from him. This back - and - forth would change their relationship in a dynamic way.
Their powers could actually be beneficial in some ways. Boruto's ability to think on his feet and use his various skills could help in solving some past problems. Himawari's Byakugan could be used for reconnaissance in dangerous situations in the past. But they must always remember that any use of their powers could have a butterfly effect. So they would need to be cautious and consult with each other before taking any major actions with their powers.
His powers would likely shock the past characters. They might see him as a great hope or a potential threat. If he uses his powers openly, it could change the way the Z - fighters train and view their own power limits.