Well, it could be that on the day of their marriage, a time - traveling event occurs. Elijah or Elena is sent back in time and has to relive certain events in their pasts. This changes their perspective on their relationship. Maybe they see things that make them realize they need to be more careful about getting married, or it could strengthen their bond even more as they face these challenges together.
One possible plot twist could be that a long - lost relative of Elena shows up to oppose the marriage. Maybe this relative has some ancient grudge against the family that Elijah is from. Another twist could be that a powerful witch casts a spell on Elijah, making him forget his love for Elena right before the wedding. Then Elena has to go on a quest to break the spell.
Perhaps a plot twist could be that Elena discovers she's pregnant, but Elijah has lost his memory due to some dark magic. So, she has to deal with the pregnancy on her own while also trying to find a way to restore his memory. This would add a lot of emotional turmoil to the story.
One possible plot twist could be that Sakura discovers Kakashi has a secret past she never knew about. Maybe he was involved in some kind of dangerous mission long ago that has consequences in the present. This could put a strain on their relationship as she tries to come to terms with this new information.
One possible plot twist could be that just before the wedding, Ayame discovers a long - lost relative who has some dark secrets about Kouga's family. This relative tries to stop the wedding by revealing these secrets to Ayame. Another could be that on the wedding day, an old enemy of Kouga shows up and challenges him to a fight, putting the wedding on hold. Or perhaps there is a misunderstanding where Ayame thinks Kouga has betrayed her trust in some way, like he made a deal with an enemy for the sake of the tribe but didn't tell her.
Maybe Hikari suddenly gets an amazing job opportunity in a far - off place. This would force them to decide between following Hikari's career dreams and staying in their current comfortable life. It could lead to some really emotional and tense moments in the fanfiction.
One possible plot twist could be a long - lost relative showing up at the wedding and revealing a family secret that threatens to stop the marriage. For example, if there's a feud in the family that was hidden from Heiji and Kazuha.
One possible plot twist could be that their marriage is part of a larger plan to infiltrate an enemy organization. They pretend to be a happily married couple but are actually gathering intel. Another could be that Neo's past catches up with her during the wedding, and they have to deal with old enemies trying to disrupt the celebration.
One possible plot twist could be that they face opposition from the Hidden Leaf Village. Since same - sex relationships might not be as openly accepted in the traditional ninja world. Another twist could be that they have to go on a dangerous mission together right after getting married, which tests their new relationship. And perhaps there's a secret enemy who wants to break them apart because their union represents a new kind of hope in the village.
Well, perhaps a plot twist could be that Naruto gets cursed. This curse makes him forget all about Ino and their relationship. Ino then has to go on a journey to find a way to break the curse. Along the way, she might face many challenges and meet new characters who either help or hinder her. Or maybe there's a twist where it's revealed that Ino was arranged to be married to someone else in her family long ago, and she has to fight against the family traditions to be with Naruto.
A third plot twist could be the appearance of an old enemy from either of their worlds. For instance, if one of Naruto's old foes teams up with an enemy from Esdeath's world. They would then have to put aside their differences and work together to defeat the common enemy, which could either strengthen or strain their marriage.
One possible plot twist could be that Hanare is actually a spy from an enemy village but has truly fallen in love with Kakashi. She has to choose between her loyalty to her village and her love for him. Another could be that just before the wedding, Kakashi discovers a long - lost family secret that makes him question whether he should get married. For example, he might find out that his family has some sort of curse that could affect Hanare.