Perhaps in the fanfiction, Elsa discovers an ancient magic that not only saves Arendelle but also heals all the neighboring kingdoms. As a result, emissaries from different lands come to worship her. She could then go on a journey with some of these emissaries to spread her magic and knowledge, all while being worshiped. This would be a story of her growth and how she uses her new - status for good.
One idea could be that Elsa, after saving Arendelle multiple times, the people start to see her as a goddess - like figure. They build shrines in her honor and hold festivals dedicated to her. The plot could explore how Elsa deals with this new - found adoration, whether she feels uncomfortable or tries to use it to further help the kingdom.
A new character could be introduced, perhaps a young girl who is inspired by Elsa and starts to worship her. This girl could then become Elsa's protege in a way, learning about magic and leadership from her. And as the story progresses, she could also help Elsa see the positive side of being worshiped.
One plot idea could be exploring how Elsa deals with the physical and emotional changes during pregnancy while still having to manage her ice powers. Maybe she has to learn to control her powers more carefully so as not to accidentally harm herself or the baby. Another could be about how the people of Arendelle react to the news. Some might be overjoyed, while others could be worried about the implications of a child with ice powers.
A possible plot is that Elsa's kingdom is threatened by a force that is related to the same kind of threats the Avengers face. The Avengers hear about her and her powers and travel to her world to offer their help. Along the way, they learn about her backstory, and she learns about their heroics. Together, they combine their powers to save her kingdom and in the process, Elsa decides to join the Avengers on some of their adventures in their own universe.
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.
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.
Well, perhaps there could be a fanfiction where Hiccup and Elsa are both summoned by a powerful wizard to help with a prophecy. They don't trust each other at first, but as they face the challenges set by the wizard, which include tasks that require both fire (from Hiccup's dragon) and ice (Elsa's power), they start to respect and care for each other.
Another interesting plot could be that the reader is a time - traveler from the future. They come to Arendelle during Elsa's reign and know about all the events that are going to happen. The reader tries to help Elsa avoid some of the hardships she will face in the future, but in doing so, they accidentally change the course of history. This creates a complex situation where Elsa and the reader have to work together to set things right while also dealing with their growing feelings for each other.
One idea could be that Dark Elsa accidentally freezes Anna's heart again, but this time it's a different kind of ice that can only be thawed with a magical item hidden in a far - off land. So, Anna has to embark on a dangerous journey while Dark Elsa struggles with her guilt.
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.
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.