One possible plot could be that after many trials and tribulations in their relationship, Damon finally proposes to Elena in a very romantic way. Maybe he takes her to a place full of their memories, like the waterfall where they once had a deep conversation. And then they plan a big, but also very private wedding, only inviting their closest friends. The wedding could be a mix of modern and traditional elements, with Stefan giving a heartfelt speech at the reception.
Stefan could be really interesting. Since he has a long history with both Elena and Damon, his reactions to their marriage would be complex. He might be a bit jealous at first but then come to fully support them, adding an emotional depth to the story.
Yes, in many fanfictions, Damon and Elena do get back together. Fanfiction writers often explore their relationship further and give them a second chance at love, as many fans were disappointed when they didn't end up together in the original series.
There are Damon and Elena married fanfiction stories that revolve around their relationship dynamics. For instance, how they handle arguments in a more mature way now that they are married. In some of these stories, they might also have to make sacrifices for the greater good of their community. Their married life could be depicted as a journey of growth, both as individuals and as a couple. They might learn new things about each other and their own selves while facing different challenges.
Caroline would be a great character to include. As Elena's best friend, she can offer advice and support to Elena in her married life with Damon. Also, Stefan could be in the story. His relationship with Damon adds depth and complexity. He might be initially hesitant about their marriage but eventually come around to support them.
One possible plot could be Damon and Elena facing challenges from the supernatural world even after getting married. For example, they might have to deal with a new vampire coven that is jealous of their relationship and tries to break them apart. Another plot could be their journey in starting a family, like how they handle having a half - vampire child and the difficulties that come with it.
Fanfiction.net is also a good place to look. There are many different categories and tags. Look for the Vampire Diaries section and then search for Damon and Elena married within that. However, the quality can vary, so you may need to read through a few to find the really good ones.
Their relationship could become more stable. With marriage, Damon might become more responsible and less impulsive. Elena would continue to be his moral compass. They'd grow closer as they face new challenges together, like renovating their house or dealing with a difficult neighbor.
One aspect of their married life in fanfiction could be their social life. They might host parties for their friends, both human and supernatural. Elena would be the warm hostess, and Damon would be the charming one, entertaining the guests with his witty remarks. And at night, they would just enjoy the quiet togetherness, maybe stargazing and reminiscing about their long and eventful journey to get married.