A possible plot for a Merlin Elizabeth back in time fanfiction could be that they are sent back in time by a magical accident. Once there, they find themselves in the middle of a power struggle in Camelot. Merlin has to use his magic subtly to support the right side without being discovered. Elizabeth, on the other hand, tries to improve the living conditions of the common people. They both face the challenge of not changing history too much, but also making things better for the people they meet. Along the way, they might encounter magical creatures that are different from those in their own time and have to figure out how to deal with them.
One idea could be that Merlin and Elizabeth go back in time to Camelot's golden age. They could use their modern knowledge to solve ancient problems. For example, they might introduce new medical techniques that save lives. Another plot could involve them trying to prevent a major disaster in Camelot's past that they know about from history books. They might also have to deal with the cultural shock of living in a different time period.
Another plot could involve Merlin traveling to the future. He might see a desolate Camelot, destroyed by some unknown force. Then he has to return to his own time and figure out how to prevent this dark future from happening. This would involve him using his magic in new and creative ways to influence the present to change the future.
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.
Another possibility is that the cat is actually a transformed being. It could be a person who was cursed and Merlin has to find a way to break the curse. The cat could communicate with Merlin in a special way, like through dreams or by leaving paw prints that form messages.
Maybe Goku goes back to the time when Planet Vegeta was still intact. He could try to prevent Frieza from destroying it. This would change the entire Saiyan race's fate and might create a whole new timeline with a powerful Saiyan empire.
One idea could be that Percy and Artemis are sent back to the time of the Titans' rule. They have to work together secretly to gather allies among the minor gods and demigods who are oppressed. Another could be they go back to the founding of Camp Half - Blood and have to make sure the important events occur as they should while also dealing with a threat that could change the future of the camp. A third plot idea might be that they are thrown back to a time when a powerful artifact was first created, and they need to prevent it from falling into the wrong hands to safeguard the future of the demigod world.
One plot idea could be Merlin and Nimue teaming up to save a magical forest that is being threatened by dark forces. They could use their combined magic to fend off the evil entities. Another idea is a time - travel plot where they are sent to the future and have to adapt to the new world while also finding a way back. And perhaps a plot where they are wrongly accused of a crime in Camelot and have to prove their innocence together.
One idea could be Merlin having to deal with the political intrigue of being a king. He might face challenges from nobles who don't trust his magic. Another could be Merlin using his magic in unique ways to improve the kingdom, like creating new irrigation systems for farmers. Or perhaps he has to form alliances with other kingdoms while hiding his true identity as a powerful sorcerer.
One idea could be that Merlin, as a wizard, is hunted by vampires because his magic is seen as a threat to their existence. But then he discovers that some vampires are not as evil as he thought and they form an uneasy alliance to fight a common enemy, like a dark sorcerer.
One idea could be exploring a different magical realm within the 'the merlin conspiracy' universe. Maybe there's a hidden land where the magic is more primal and ancient. Another could be a story about a young wizard who discovers they have a unique connection to Merlin himself and must use that to stop a new dark threat.
A plot could involve Merlin getting cursed and the knights having to find a way to break it without Merlin's magic to guide them. They might have to rely on old legends and their own wits to save him. This could lead to some great character development for the knights as they face challenges they usually rely on Merlin to solve.