A really interesting plot could be that Elsa's powers are somehow connected to an ancient vampire curse. Maybe her family was cursed long ago, and the vampire side of the curse is now emerging. She starts having strange cravings and abilities that she doesn't understand. She has to embark on a journey to find out the origin of the curse and how to break it. Along the way, she meets other characters, some of whom are vampires, and she has to decide who to trust. This journey could take her to different realms, including the dark underworld of vampires, and she has to use her ice powers and her wits to survive and save herself and her kingdom.
One idea could be that Elsa discovers she has vampire powers after being bitten in a hidden part of the frozen forest. Another could be a love story where a vampire falls for Elsa and tries to convince her to embrace the dark side while she struggles with her own ice powers and the implications of becoming a vampire. Or perhaps Elsa is turned into a vampire and has to learn to control her new thirst while still ruling Arendelle.
A plot idea might be that there is a strange blizzard that is not caused by Elsa. Kristoff, suspecting foul play, comes to Elsa for help. Together, they discover a dark sorcerer is behind it. As they battle the sorcerer, Kristoff helps Elsa see that she doesn't have to be afraid of her powers and can use them more freely. This could lead to a deeper friendship or more between them.
One idea could be that a powerful dark sorcerer kidnaps Elsa because he wants to use her ice powers for his own evil deeds. He locks her in a magically sealed dungeon deep in an ancient castle. Another plot could involve a group of thieves who mistake Elsa for a valuable princess they can ransom. They take her to a hidden lair in the mountains. A third option is that a jealous rival from another kingdom, who envies Elsa's powers and her popularity, arranges the kidnapping to discredit her.
One plot idea could be that Elsa discovers a mysterious stranger from a far - off land who is immune to her ice powers. As they get to know each other, she starts to fall in love. They go on adventures together, exploring new lands and facing challenges that test their relationship.
One idea could be that Elsa and Anna discover a hidden magical realm within Arendelle. They meet new magical creatures there and have to work together to solve a problem that threatens both this new realm and Arendelle. For example, a dark magic is spreading and only Elsa's ice powers combined with Anna's courage can stop it.
One plot idea could be Elsa's journey in dealing with her newfound state while still having to rule Arendelle. She might struggle with how to balance her duties and her pregnancy. Another could be the reactions of the people in Arendelle, some might be overjoyed and see it as a new beginning, while others could be worried about the implications for the kingdom. Also, we could explore how Elsa's powers interact with her pregnancy, like whether her emotions during this time affect her magic in unexpected ways.
One idea could be that Elsa discovers she has the power to create a magical baby snow creature, and Jack Frost comes to visit and is fascinated by it. They then start to explore the possibilities of Elsa's powers together in relation to this new creation.
A possible plot could be that there is a lemon - themed festival in Arendelle. Hans, who has returned after his banishment, tries to win Elsa's forgiveness during this festival. Elsa is initially skeptical but as they both participate in the lemon - inspired games and activities, they start to develop a new relationship that is different from their previous encounter.
One plot idea could be that Anna discovers a new magical power within herself and Elsa helps her learn to control it. This could involve a journey through the Enchanted Forest where they face various challenges together and their bond grows stronger as a result. Another idea is a time - travel plot where they go back in time to prevent a past event that had a negative impact on their relationship. They could also face a new villain who is specifically targeting their sisterly bond, forcing them to work together to defeat the foe.
Some interesting Frozen 2 fanfiction plot ideas could revolve around the idea of a magical item. For example, there could be a magical crystal hidden deep in the forest that has the power to either save or destroy both the forest and Arendelle. Elsa and her friends embark on a quest to find this crystal before it falls into the wrong hands. Another idea is that a dark force from outside the known world tries to invade the forest and Arendelle, and the characters have to unite not only the people of Arendelle and the forest but also other magical beings to fight against it. Also, a plot could be centered around a prophecy that was never fully revealed in the movie, and Elsa and Anna must figure out what it means for their future.
Well, a possible plot is that Elsa's pregnancy is a result of some magical encounter. As she progresses through the pregnancy, she starts to notice that her unborn child has an affinity for ice magic even before birth. She then decides to create a special, safe place made of ice for the baby to be born in. And also, she could have dreams about the future of her child, which guide her in making decisions for Arendelle's future as well.