Often, Dean will go back in time and accidentally change something small that has huge ripple effects on the future. Like he might save someone who was supposed to die, and then that person ends up causing a lot of chaos in the future that Dean has to fix. This creates a cycle of trying to set things right again. Another plot twist could be that when he goes back, he meets an alternate version of himself or his loved ones that are very different from what he knows, and he has to figure out how to deal with them.
One common theme is redemption. When Dean goes back in time, he often tries to right the wrongs of the past, whether it's saving someone who died too soon or preventing a bad event from happening. Another theme is self - discovery. By being in a different time, he gets to see himself and his relationships in a new light.
One great fanfic could be 'Time's Twist'. In this, Dean goes back and has to face his past self, which creates a really interesting dynamic. He tries to change some things without ruining the future, and it's full of action and the classic Dean Winchester humor.
One great 'dean goes back in time fanfiction' is 'Time's Twist'. It has an interesting plot where Dean goes back to a crucial moment in his family's history and tries to change things for the better. Another one is 'Backward Bound Dean' which focuses on how Dean's actions in the past ripple through time and affect his present.
Well, in some fanfictions, they go back in time and accidentally interfere with the lives of their younger selves. This creates all sorts of chaos as they have to deal with the younger Sam and Dean's reactions to seeing their future selves. Or perhaps they go back to a crucial moment in the history of the hunter community and end up changing the rules and relationships within it. It could also be that they go back in time to a specific era like the Wild West and have to deal with supernatural threats that were prevalent during that time.
One plot idea could be Sam going back in time to prevent a major tragedy in his family's past. For example, he could try to stop the demon from killing Mary Winchester, which would change the entire course of his and Dean's lives. Another idea is that he goes back to a time when hunters were just starting to organize and he tries to influence the development of the hunting community for the better.
A lot of dean winchester time travel fanfiction also has the theme of brotherly love. Sam and Dean's relationship is central to the Supernatural series, and when Dean travels through time, it often affects Sam in some way. Whether it's to protect Sam from a past threat or to bring him back from a future where he's in danger, the bond between the brothers is always a key part of these stories.
The main characters are Sam and Dean Winchester, of course. But in some fanfictions, Bobby Singer might also be involved. Since he was like a father figure to them, he could be the one guiding them through the time - travel process, or he could be there in the past waiting for them. Also, the characters of their parents, Mary and John Winchester, might show up if they go back to a time when their parents were alive.
There could be. Fanfiction is a very diverse medium with a wide range of themes and interpretations. While the main body of 'Supernatural' fanfiction focuses on positive aspects of Dean's character, like his heroism and relationships, there may be some darker or more disturbing pieces that involve abuse. But it's not a common or widely - accepted theme within the fandom.
He could meet his grandparents. Meeting them would give him a deeper understanding of his family history and the roots of the Winchester family's connection to the supernatural. Another interesting character would be young John Winchester. Sam could see what his father was like before all the tragedies happened and maybe even influence him in a positive way.