Another great time - travel scenario could be Ben going to a future version of the Omniverse. He could see how his actions in the present have affected the future. He might discover new forms of the Omnitrix or new allies and enemies that have emerged as a result of his present - day decisions.
Time travel could also put a strain on his relationships. If Ben goes to the future and sees something bad happen to his friends or family, he might become overprotective when he returns to the present. This overprotectiveness could annoy his friends and cause friction in their relationships, as they might not understand why he's suddenly acting so differently.
The battles with Vilgax are really exciting. Ben using his different alien forms against such a powerful enemy is great.
Goku would be really interesting. His naivete in a time - travel situation could lead to all sorts of unexpected events. He might not fully understand the implications of changing the past and end up doing things just because they seem fun at the moment. Sanzo is also a great choice. His no - nonsense attitude in a different time period could create a lot of conflict, especially if he has to deal with the different cultural and social norms of the past. Another interesting character is Hakkai. His intelligence and ability to adapt would make for some really engaging time - travel stories as he tries to figure out how to use his skills in a new and unfamiliar time.
Daniel LaRusso would also be great. Imagine him traveling back to the time when Mr. Miyagi was teaching him as a young boy. He could relive those moments and maybe learn something new that he can apply to his current situation in the series. He might also use his knowledge of the future to prevent some bad things from happening to his family.
One idea could be Ben going back in time to prevent an alien invasion that in the original timeline led to the destruction of his hometown. He could use his ultimate alien forms in creative ways to outwit the invaders before they even start their attack.
Definitely Ben himself. His ability to transform into different aliens makes for interesting scenarios in different time periods. For example, in the past, he could transform into an alien that was thought to be a myth, causing all kinds of chaos or amazement.
A really exciting plot is when Ash travels to a post - apocalyptic future of the Pokémon world. He has to find a way to go back and prevent this future from happening. Along the way, he teams up with some unlikely Pokémon and humans. It's a story of survival and hope, and the way the author describes the desolate future world is both terrifying and fascinating.
For Logan in a time - travel fanfiction, keep his core traits intact. His gruffness, loyalty, and his inner struggle with his past should still be there. But add new layers based on the time - travel experience. For example, if he travels to the past, he might be more cautious as he knows the future consequences.
One idea for a Ben 10 Ben and Young Gwen time travel fanfiction could be that they travel back to the time when the Omnitrix was first created. They could witness the origin of the device and perhaps even meet the aliens who had a hand in its creation. This could lead to them learning secrets about the Omnitrix that they didn't know before, which could help them in their present - day battles.
The time - travel element itself is exciting. It allows for a unique blend of historical and modern naval concepts. For instance, a character might introduce modern weaponry ideas into an old - time naval battle.