Well, a plot for 'The Time Traveling Wife' fanfiction could be about the wife time traveling to a time when she meets a younger version of her husband. She could then try to guide him in some way without changing the future too much. Or, what if she travels to a parallel universe during her time travels? In that universe, their relationship could be completely different, and she has to find a way back to her own reality. Also, a story where she gets stuck in a time loop during one of her travels and has to break free.
A possible plot for the fanfiction is that the wife's time traveling starts to have unforeseen consequences on her health. This makes the husband desperate to find a way to stop her from traveling or at least control it better. Maybe she starts to forget things from her present life because she's spending so much time in other times. Another idea is that the wife discovers that there are other time travelers like her, and they form a sort of secret society. This could lead to all kinds of adventures and revelations about the nature of time travel in the context of the story.
One idea could be exploring the wife's time travels to different historical events not shown in the original. For example, she could travel to the signing of the Declaration of Independence. Another could be a story where the husband also gains the ability to time travel briefly and they have to figure out how to manage their travels together. And perhaps a plot where the wife travels to a future time and sees how their relationship impacts future generations.
One plot idea could be that Ichigo goes back in time to the moment before a major battle in the Soul Society arc. He uses his knowledge of the future to prevent certain casualties and change the course of the battle in a more favorable way for his side. Another idea is that he travels back to his own childhood and tries to understand his powers better from an earlier age, which could lead to him becoming even stronger in the present. Or perhaps he goes back to a time when the Hollows first started emerging in large numbers and tries to find the root cause of their sudden increase, which could potentially change the whole history of the Soul Reaper - Hollow conflict.
One idea could be Naruto going back to the time of the First Hokage to prevent a dark jutsu from being created that later causes chaos in his own time. He could use his knowledge of future events and his powerful jutsu to stop the wrongdoings.
One plot idea could be that Naruto, while pregnant, travels back in time to the founding of Konoha. He uses his knowledge of the future to prevent certain tragedies from occurring during the village's creation, all while dealing with the physical and emotional challenges of being pregnant in a different time. Another could be that he travels to a time when the Uchiha clan was still intact and tries to change the events that led to their downfall, with his pregnancy adding an extra layer of complexity as he has to protect his unborn child too.
Well, perhaps they could travel to different music festivals around the world in the fanfiction. They start at Coachella in the US, enjoying the diverse music and art. Then they head to Glastonbury in the UK, getting muddy but having the time of their lives. Along the way, they meet other music lovers who join them on their journey, and they end up creating their own mini - music festival on a remote beach.
One idea could be to have the girls go on a new adventure outside of the countries they've already visited in the original story. Maybe they find a hidden message in the pants that leads them to a mysterious island. Another could be that a new girl somehow gets involved with the pants and the sisterhood has to decide whether to let her in or not. And they could also face a situation where the pants get lost in a really strange place and they have to rely on their friendship more than ever to find them.
One plot idea could be Clementine time - traveling back to before the apocalypse started. She could try to prevent the initial outbreak, maybe by finding the source of the virus early on. Another idea is that she travels to different points during the apocalypse and meets versions of herself or her friends at different stages of their development. For example, she could meet a younger Lee and warn him about certain events that are going to happen.
One idea could be that the vampire wife has to hide her true nature from her human in - laws. Another could be a story where she uses her vampire powers to protect her family from other supernatural threats. Maybe she struggles to fit into the modern human world while still maintaining her vampire traditions.
One idea could be exploring her life before meeting Achilles. Maybe she was a strong - willed princess in her own right, trained in combat secretly. Another could be her dealing with the pressures of being married to a great warrior like Achilles, and how she copes when he's away at war for long periods.
One interesting plot idea could be Naruto using his future knowledge to prevent certain tragedies. For example, he might be able to save some of the ninjas who died in the original war. Another idea is that he could change the power dynamics between the villages. Maybe he teams up with a younger version of an enemy ninja and they form an unexpected alliance that changes the course of the war.
Maybe a story where two characters from different time periods in the 'heartlands of time' meet accidentally. They then have to work together to solve a problem that is affecting both of their respective times. It could involve a power struggle over a time - based resource that is crucial for the stability of the 'heartlands of time'.