One interesting plot twist could be that Arthur actually kidnaps Merlin to protect him from a greater danger that Merlin is unaware of. Maybe there's a powerful sorcerer after Merlin, and Arthur believes the only way to keep him safe is to take him away secretly.
Perhaps Arthur is under a spell when he kidnaps Merlin. This could lead to a whole exploration of how Merlin tries to break the spell on Arthur while also dealing with the situation of being kidnapped. It would add an element of mystery and magic to the story.
During the time of Merlin's captivity, they could have long conversations that they never had before. Arthur might open up about his insecurities regarding magic and his kingdom, and Merlin could share his true feelings about serving Arthur. This would strengthen their bond in a new and unexpected way.
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.
One idea could be that Merlin, Arthur, and the Smurfs team up to save their respective kingdoms from a common dark magic threat. The Smurfs' magic combined with Merlin's could create a powerful force against the enemy. Another plot could involve Arthur getting lost in the Smurf village and learning their simple and happy way of life, which then influences his rule in Camelot.
One idea could be that they face challenges from the court. Some nobles might oppose their union due to Merlin's humble origins. Another could be that Merlin's magic becomes a public knowledge after the marriage, and they have to deal with the reactions of the people. A third idea is that they go on a quest together as a married couple to find a magical artifact that can help protect Camelot from a new threat.
A great plot twist could be that fem Arthur is actually related to one of the hidden clans in the Naruto world. This revelation changes the way Naruto and his friends view her and also adds a whole new layer of mystery to her character.
A plot twist might be that the baby has some sort of prophetic power even before it's born. This power could show visions to Morgana or Merlin about the future of Camelot. It could also be that the pregnancy is part of a grander magical plan set in motion centuries ago by an ancient sorcerer, and Merlin and Morgana are just pawns in this plan, not realizing the true significance of the pregnancy until later events unfold.
Well, perhaps Draco, in the role of Merlin, has a special connection to the magical creatures that he uses to help Harry. Harry, as Arthur, is trying to unite the different factions of the wizarding world. Draco's knowledge of magic, similar to Merlin's, allows him to create magical artifacts or spells that assist Harry in his quest for unity. And there could be a love story involved too, like Guinevere and Arthur, but in the context of the wizarding world with some other character and Harry.
One idea could be that in a moment of extreme danger, Merlin and Arthur share a kiss as a way of saying goodbye, not realizing they'll both survive. It could be a spur - of - the - moment, passionate kiss that catches them both by surprise. Later, they have to deal with the newfound feelings this kiss has unearthed.
One idea could be that Merlin accidentally casts a time - travel spell and takes Arthur to the future. There, they see a world where magic is accepted and Camelot has become a legend. Another could be Arthur traveling back in time to meet a young Merlin before he came to Camelot. This would change their initial meeting dynamic.
One idea could be that they discover a long - lost magic artifact together that has the power to unite all the kingdoms in peace. Another could be that they face a common enemy who is threatening Camelot and they have to combine their skills, Arthur's leadership and combat abilities and Merlin's magic, in a new and unexpected way.