Perhaps the veterans come together to share their war stories in a more peaceful and festive setting. They might exchange gifts that hold special significance related to their military experiences.
In the fanfiction after the ending, they may also reach out to the local community. They could volunteer at a local shelter, sharing the Christmas spirit with those less fortunate. This would show how their military values of service and selflessness continue even in civilian life during the holidays.
It may show them having a sense of relief. After all the chaos and hardships, Christmas gives them a moment of calm and they are able to feel joy more deeply. Their emotions could be a mix of nostalgia for their military days and excitement for the new beginnings the holiday represents.
Another idea is that Draco becomes involved in some sort of underground magical movement. After Azkaban, he may be disillusioned with the established magical order. He could join a group that aims to reform or even overthrow the current power structures in the wizarding world, leading to all sorts of adventures and conflicts.
Well, if a fuse is out in a Christmas story, the lights on the Christmas tree might go out. That would surely dampen the festive mood a bit. Maybe the family would start searching for candles to create some soft, warm light instead, like in the old days.
One possibility is that it could lead to a significant change in Molly's character. She has always been in Sherlock's shadow to some extent. Now, being pregnant, she would have to become more assertive. She might decide to step away from the dangerous cases Sherlock gets involved in to protect her unborn child. This could also cause some friction between her and Sherlock if he doesn't understand her decision.
Well, one possibility is that Gohan might go into a period of self - discovery. After such a huge battle, he's likely to question his role in the world. Maybe he'll travel to find other powerful fighters and train with them. Another thing could be that he'll try to live a normal life for a while, like going back to school, but find it difficult because of his new - found power and the memories of the Cell Games.
Well, perhaps Taki and Mitsuha could start a new life together in Tokyo. They might study at the same university and continue to explore their relationship. They could also introduce each other to their families more formally and start building a future as a couple.
Another possibility is that Naruto might seek out other sources of power in his 'insane' state. Maybe he would be more willing to explore dangerous or forbidden jutsu in an attempt to gain the strength he thinks he needs. This could put him in conflict not only with the village but also with other powerful forces in the Naruto universe. He might even be lured by dark entities that promise him power in exchange for certain things.
He could start hallucinating about his past battles or his dreams due to the fever from the cold. His friends might get really worried and call in Tsunade to check on him. Tsunade could discover that Naruto's chakra is also affected by the cold, which leads to some interesting plot developments about how to get his chakra back to normal while also curing the cold.
In fanfiction, the possibilities are endless. It could be that they go on an adventure to a previously unknown magical land or face a powerful dark wizard who was thought to be defeated.
Well, it could go in many directions. They might travel to a previously unknown magical realm or encounter creatures that were only hinted at in the original series.