In this type of fanfiction, a great plotline could be Naruto traveling to a universe where the concept of good and evil is completely reversed. His own values are challenged as he tries to understand this new world. He might initially be seen as an enemy because of his different moral code. He has to figure out how to coexist or even change the views of the people in this strange universe. He could start by befriending some of the outcasts who share his more familiar views on morality.
One possible plotline could be Naruto arriving in a universe where chakra doesn't exist, and he has to learn new forms of power. Another could be that he meets alternate versions of his friends with different personalities. For example, Sasuke could be a pacifist in that universe.
Well, in some fanfictions of 'naruto travels to deff universe', Naruto might find himself in a universe ruled by machines. He then has to use his ninja skills in a completely different way to survive and maybe even find a way to return home. He could team up with local rebels who are fighting against the machine overlords.
He could make allies with the local magic users if the universe he travels to has a magic system. They might be intrigued by his ninja abilities and see the potential in working together.
One interesting plotline could be Naruto arriving in an alternate universe where the Akatsuki are the heroes. He has to figure out how to navigate this new world where his former enemies are now revered.
One interesting plotline could be Naruto encountering different versions of his friends in various universes. For example, he might meet a Sasuke who is a powerful mage instead of a ninja. Another could be Naruto facing new and unique villains that only exist in certain multiverse realms. He may also have to adapt to different ninja cultures and power systems in different universes, which would be really exciting to explore.
One interesting plotline could be Naruto making unexpected alliances with different clans in the elemental nations. For example, he might team up with a water - based clan and learn their unique water - style jutsu techniques, which he can then combine with his own skills.
In some fanfictions, Naruto might go back in time and try to save his parents. He could alter the events that led to their deaths. This would not only change his own life but also have a huge impact on the entire ninja world as his parents were very powerful ninja.
One interesting plotline could be Naruto using his knowledge of the future to prevent certain tragedies that occurred during the war. For example, he might be able to save some of the fallen comrades. Another could be his attempts to change the political situation in the ninja world for the better, leveraging his experiences.
In some 'Harry Potter travels to alternate universe fanfic' plotlines, Harry might find that his parents are alive in the alternate universe. This would be a huge emotional rollercoaster for him. He would have to deal with the fact that he has a different family dynamic, and also figure out how this affects the fight against evil. Additionally, the alternate Hogwarts could have different teachers or even different subjects. This would open up a whole new world of exploration for Harry.
He'd use his ninja training. Naruto has always been good at adapting in his own world, so he'd likely rely on his skills and instincts.
In this fanfiction scenario, Naruto could bring his ninja skills to the Def universe. He'd probably have to adapt to the new environment. For example, if the Def universe has different laws of physics, his usual jutsu might not work the same way. He might also learn new techniques from the Def universe and combine them with his own.
One interesting plotline could be Rose and the Doctor exploring a lost civilization. They might encounter strange creatures and have to solve puzzles to escape. Another could be a time - travel adventure where they go back to a crucial moment in history and accidentally change something, then have to fix it.