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 characters' development across time can be shown in various ways. Take Merlin for example. In the past, he was constantly hiding his magic, but in the future, he could be more open about it if magic has a different status. His growth in power and self - acceptance would be evident. Morgana, who started as a complex character with good intentions in the past, might have evolved into a more extreme figure in the future depending on the events that transpired. Her journey from a conflicted young woman to a more hardened one can be explored. And for the knights, they could start as loyal but rough - around - the - edges warriors in the past and in the future be seen as legends, with their stories of heroism and honor having grown over time.
They might have a tense encounter. Given their past history in the original story, Merlin could be cautious. Maybe Morgana has changed in the future, but Merlin still has his doubts. He might be on guard, ready to use his magic if needed.
Their relationship could be more complex. Instead of the straightforward enmity of the past, they might be forced to cooperate due to new circumstances. So, it's no longer just about good vs. evil.
Another theme is the exchange of knowledge. For instance, a character from the past might have some unique skills or knowledge that is valuable in the future, and vice versa. They then share and learn from each other, like an ancient herbalist teaching future doctors about natural remedies that have been forgotten.
One way is through time - travel jutsu. A character could accidentally or intentionally use a jutsu that sends them to the future or past. For example, Naruto might find a hidden scroll with a time - travel jutsu and end up in the future where he sees how his friends and the village have changed. This could lead to interesting storylines where he tries to fix things or learn from the future.
One idea could be a time - traveling hero from the past who gets stuck in a high - tech future world and has to adapt to new technologies while using his old - fashioned skills to solve problems. For example, a medieval knight in a world of flying cars and laser guns.
One possible plot could be that future Gohan travels back in time to warn the past about an upcoming threat that was not properly dealt with in his own timeline. He might meet the past version of himself and try to train him to be stronger, sharing his knowledge of the future battles. Maybe he also meets the past versions of his friends and family, and has to convince them of the seriousness of the situation without revealing too much about the dark future he comes from.
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.