What are some interesting plot ideas for 'Arthur and the Invisibles fanfiction'?

One idea could be that Arthur crosses over into a world where the Invisibles are facing a new and powerful enemy. He uses his human creativity and skills to help them find a solution. For example, he might introduce new technologies or ways of thinking that the Invisibles haven't considered before.

A character like Alice from 'Alice in Wonderland' could be really interesting. She's used to strange and magical worlds, so she could interact with the Invisibles in a unique way. Maybe she could help Arthur navigate some of the more confusing aspects of the Invisibles' world with her own experiences in Wonderland.

Arthur is the main character. He is a young boy who embarks on an adventure in the world of the invisibles. There is also Princess Selenia. She is a brave and strong - willed character in the invisible world.

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.

The baby could be a key to uniting two warring factions in the Arthurian world. Arthur and Gwen would then have to navigate the political and social implications of this. They could have to protect the baby from those who would use it for their own gain. Or perhaps the baby has a unique connection to the magical elements of the land, like being able to make plants grow instantly or control the weather. This would attract the attention of both good and bad forces, and Arthur and Gwen would have to be vigilant.

One plot idea could be Issei discovers a hidden relic related to King Arthur. This relic gives him some of Arthur's powers, leading to a power - up journey where he has to learn to control these new abilities while also facing enemies who want the relic for themselves. Another idea is that Issei somehow travels back in time to the era of King Arthur and has to interact with the legend himself, maybe even joining Arthur's knights for a while.

One idea could be a time - travel plot where Hermione somehow gets sent back in time and meets a younger Arthur Weasley. They could team up to solve a mystery that is related to the Weasley family's past and the wizarding world at large. This would allow for a lot of exploration of the wizarding world's history and the early days of the Weasley family.

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.

Since 'lemon' fanfiction often involves adult or sexual content, which is inappropriate for a family - friendly work like 'Arthur and the Invisibles', I cannot provide details on what might be in such fanfiction. It goes against the spirit of the original story.