One common theme is redemption. Characters from the past might have made mistakes and in the future - set story, they get a chance to make up for it. For example, a character who was once a villain in the past might find a way to redeem themselves in the future. Another theme is the cycle of life. The past and future are often used to show how things come full circle, like how a character's actions in the past lead to consequences in the future that in turn affect the past again. And of course, the power of memory. How memories from the past shape the future and how characters deal with forgotten or recovered memories is also a big part of these fanfictions.
One common theme is self - discovery. When Naruto from the past goes to the future, he often has to re - evaluate who he is in the context of this new world. Another theme is the impact of the past on the future. It shows how the actions and decisions made in the past can have far - reaching consequences.
One idea for this 'Past Kakashi Meets Future Obito' fanfiction could be that their meeting is not a coincidence. Maybe it's part of a grand plan by some mysterious force. When they meet, past Kakashi would be in awe of future Obito's power and skills. Future Obito, though, would see the innocence still in past Kakashi. They could end up training together, with future Obito teaching past Kakashi some new jutsu. And as they bond, they might rewrite their fates and change the future of the ninja world for the better.
It could be a corrupted Gem from the past that was somehow locked away and now resurfaces in the future, angry at the changes that have occurred. This Gem might not understand the new world order and wants to return things to how they were.
Well, I really like 'Bleach: Future Visions of the Past'. In this fanfiction, the author does an amazing job of bringing back beloved characters from the past and showing how they would react to the future of the Bleach world. It has some great fight scenes and character development. Then there's 'Bleach: When Past and Future Collide'. This one focuses on the collision of different eras in the Bleach universe. The story is filled with action and emotional moments as characters from different times have to work together. And 'Bleach: The Link Between Past and Future' is also a good read. It shows how the past is intertwined with the future in ways that are both obvious and unexpected.
Well, 'A Glimpse Beyond Time' is another great one. The story begins with Naruto having a strange encounter that sends him to a future where things have changed drastically. He has to figure out a way to get back to his own time while also dealing with the challenges in the future. It has some really cool fight scenes and emotional moments as Naruto tries to understand this new world he's in.
One plot idea could be Merlin traveling to the future and finding that magic has been completely forgotten. He then has to figure out a way to re - introduce magic without causing chaos. Another could be a future descendant of Merlin's friends coming back to the past and accidentally changing the course of history, so Merlin has to fix it. A third idea is that in the future, there is a new dark magic threat that can only be defeated with the knowledge Merlin has from the past.
The idea of past villains resurfacing in the future in a different form is also fascinating. Maybe Voldemort's ideology gets reincarnated in a new dark wizard, and the heroes from the past and present have to team up to defeat this new threat. This would show how the past and future are intertwined in the fight against evil in the wizarding world.
Perhaps past versions of the Crystal Gems meet their future selves. They could be shocked by how much they've changed, or they might learn valuable lessons from each other. The past Gems could see how their actions in the past led to the future they now inhabit, which could be a really interesting exploration of cause and effect.
A cool plot twist could be that future Obito is actually there to stop past Kakashi from making a certain decision that would have far - reaching negative consequences. Another one might be that past Kakashi discovers that future Obito has a hidden agenda that is not what it seems at first.