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.
A great plot could be that an evil wizard tries to steal the Smurfs' essence to gain more power. Merlin senses this and takes Arthur with him to stop it. Arthur, at first, doubts the Smurfs' ability to fight but soon realizes their courage. Meanwhile, the Smurfs teach Arthur and Merlin some of their own tricks of survival and magic. In the end, they defeat the evil wizard and form an alliance between Camelot and the Smurf village.
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 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.
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.
One plot idea could be that they have to overcome the initial shock and resistance from the kingdom. Since it's an unconventional relationship in their world, they face challenges from the court, nobles, and even some of the common folk. But through their unwavering love and some heroic deeds, they gradually win people over. Another idea is that a magical curse forces them to get married to break it, and in the process, they discover their true feelings for each other.
It could be an evil sorcerer who wants to control both Camelot and the Smurf village. He sees the power in Merlin and Arthur's connection, and the unique magic of the Smurfs, and wants it all for himself.
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 Gwen discovers she has some latent magical ability during her pregnancy, which is awakened by the life growing inside her. This could cause a stir in Camelot as magic is feared. Merlin then has to step in to help Gwen control her powers and keep it a secret from those who would harm her. Also, Arthur could be faced with the dilemma of how to protect Gwen and the baby from the anti - magic sentiment in the court.