Naruto could meet alternate versions of his friends or enemies. For example, he might find a version of Sasuke who has a completely different personality or a different set of skills. This would create interesting interactions and potential conflicts or alliances.
His relationships with others could change. If he's in a new dimension for a long time, he may form new bonds with characters there. These new relationships could influence how he views his old friends back in his original dimension. He might also learn new ways of communicating and building trust, which he can then bring back with him if he ever returns.
In the alternate dimension, Naruto could find that the Akatsuki are actually the protectors of the villages. This would completely change his view of the world. He would have to re - evaluate his ideas about good and evil and decide whether to help them or oppose them depending on their true motives.
In the context of fanfiction, Naruto's jump could have some unexpected consequences. Maybe as he jumps in front, he discovers a new power within himself. This new power could be something that not only saves his friends but also changes the course of the battle. It could be a power related to his connection with the Nine - Tails or some other hidden ability that gets unlocked due to his strong will to protect his friends.
It could be that Naruto jumps in front of Obito in a moment of desperation. He might not have any other option to stop Obito's immediate attack. This action could be a turning point in the story. It could inspire other characters to join Naruto in his fight against Obito. Also, it could show Obito the strength of Naruto's will, which might make him question his own motives and actions.
One possible plot twist could be that in the other dimension, Naruto finds out that all his friends have different personalities. For example, Sasuke could be a peaceful scholar instead of a brooding avenger. Another twist might be that the chakra system works completely differently in this new dimension. Maybe instead of using hand signs, they use some kind of mental power to perform jutsus. Also, Naruto could discover that the Akatsuki in this dimension are actually the good guys, fighting against an evil ninja clan that wants to take over the world.
A group of rogue ninja from the other dimension could also serve as the main antagonists. They might be jealous of Naruto's power from his original dimension and want to steal it for themselves. They could be led by a charismatic and devious leader who has a personal vendetta against Naruto for some reason, like he believes Naruto will disrupt their way of life in the dimension.
In fanfiction, if Naruto jumps off a cliff, he might be saved by a hidden power. Maybe he discovers a new jutsu on the way down that allows him to fly or slow his fall. It could also be that a mysterious character appears out of nowhere and catches him.
Well, if Naruto joins another village in fanfiction, he might bring his unique skills and values. For example, his powerful jutsu like the Rasengan could be a great asset to the new village. He might also influence the village's culture. Since Naruto is known for his never - give - up attitude, he could inspire the shinobi in the new village to be more determined in their training and missions.
Well, they might share their Uzumaki clan stories. Naruto could learn something new about his heritage from this other Uzumaki fan. Maybe they'd team up for some kind of mission related to the Uzumaki clan's secrets.
In fanfiction, if Naruto is sent to a different dimension, he might face all kinds of strange new powers and enemies. For example, he could encounter magic that is completely different from chakra. He would have to quickly adapt to survive. Maybe he'd find allies who are also lost in this new dimension and together they'd try to find a way back home while also dealing with the local threats.