Another plot could be that one of the main characters has a pre - wedding jitters dream where everything goes wrong at the wedding. But then they realize that it's just their fears getting the best of them, and it actually strengthens their resolve to have a perfect wedding. This can also show the support of their friends and family as they help the character through their doubts.
One idea could be a long - lost relative showing up at the wedding and causing chaos. Maybe they claim to have a right to some family heirloom that was supposed to be part of the wedding decor. Another could be a sudden storm during the outdoor wedding, and the Gallaghers have to quickly move the ceremony indoors, with all the hilarity and chaos that comes with it.
One idea could be that Bella is forced into the wedding with Demetri due to some vampire politics. But as time goes on, she discovers a softer side to Demetri that she didn't expect. Another could be a time - travel plot where Bella from the future comes back to stop the wedding but ends up falling in love with Demetri in the past. Or perhaps there's a mix - up where Bella thinks she's marrying Edward but it turns out to be Demetri at the altar, and then they have to figure out their relationship from there.
A really interesting plot could be that right before the wedding, a dark wizard from Ron's past tries to disrupt it. Hermione and Ron, along with their friends, have to fight off the threat while still making sure the wedding goes on as planned. It would add a lot of action and adventure to the fanfiction.
A great plot for Harry and Hermione's wedding fanfiction could be that they face some sort of dark magic threat right before the wedding. They have to use their combined skills and the help of their friends to overcome it. Then, the wedding becomes not just a celebration of their love but also a victory over evil. For the actual wedding, Hermione could wear a dress that has some magical properties, like changing colors to match her mood, and Harry could have a special wand that he uses to create a unique display of magic during the ceremony.
One idea could be that Merlin has to hide his magic even on his wedding day to Arthur. Maybe there are some old enemies who try to disrupt the wedding, and Merlin uses his magic subtly to protect everyone without being detected. Another plot could involve Arthur trying to incorporate some of Merlin's commoner traditions into the grand royal wedding, causing some comical and heartwarming moments among the nobility.
Maybe the wedding is a secret affair at first. Kirito and Asuna decide to elope and have a small, private ceremony in a beautiful, secluded location within the game. They could face some challenges during the planning, like dealing with in - game enemies who try to disrupt the event. And then later, they surprise their friends with the news.
One idea could be that Naruto and Sakura have a traditional Japanese - themed wedding. All their friends from the village come to celebrate. There are cherry blossoms everywhere as a nod to Sakura's name. Another could be a wedding where they face some last - minute threats from old enemies who try to disrupt the ceremony but their friends and their love for each other help them overcome it.
One idea could be a wedding between a wizard from Gryffindor and a witch from Slytherin, which could cause a stir among the Hogwarts alumni. They might have to overcome the old prejudices of their houses. Another could be a wedding set during a time of peace after the battle of Hogwarts, with characters like Harry and Ginny as guests, and the wedding could incorporate a lot of traditional wizarding wedding elements like flying doves made of light magic.
Maybe there could be a plot where they face opposition from some quarters. Some might not approve of a union between Harry and Daphne due to their houses' historical rivalries. They would then have to overcome these prejudices and prove that their love is stronger than the old grudges. This could involve them going on a quest together to show that they are a united front and are meant to be together.
One idea could be to crossover with another fantasy world. For example, bringing in characters from a popular high - fantasy series. They could interact with the ponies during the Canterlot wedding, perhaps causing some chaos or misunderstandings. Maybe a character from the other world mistakes the wedding for a coronation and tries to claim the throne.