Perhaps in the fanfiction, Elsa realizes that Hans was misunderstood. He was under pressure from his own family to try and take over Arendelle in a wrong way. As Elsa forgives him and they start working together to improve relations between their kingdoms, they develop feelings for each other. Hans courts Elsa in the traditional way, with flowers, poems, and horse - drawn carriage rides. Eventually, they get married and use their combined leadership skills to create a more prosperous and peaceful world for their people.
Their relationship would likely become more solid. Having a baby together means they have a new shared responsibility. They would have to rely on each other more, like when taking care of the baby at night or making important decisions about the baby's future.
One possible plot twist could be that Elsa discovers Hans' true motives just before the wedding. Maybe she overhears him talking about using their marriage to gain more power in Arendelle. Another twist could be that an old enemy of Arendelle tries to stop the wedding by creating chaos. Or perhaps Elsa's powers start to act up in a new and unexpected way during the ceremony, threatening to destroy everything.
At first, they might develop their relationship through helping each other. Hans could assist Elsa in learning about diplomatic relations with other kingdoms, while Elsa could teach Hans about controlling his temper (assuming he has improved). As they spend time together in these educational and growth - oriented activities, they begin to see each other in a new light. They find themselves attracted to the new, improved versions of each other and so they get married.
It might start with a chance encounter. They see each other in a new light and gradually start to develop feelings. Their relationship develops as they exchange kind words and small gestures of kindness.
Anna would be a likely candidate to rescue Elsa. She loves her sister deeply and has shown great courage in the past. She would stop at nothing to find and free Elsa from Hans.
Anna could be the one to save Elsa. After all, she has proven herself brave and determined in the original story. She would stop at nothing to rescue her sister from Hans's clutches.
In Elsa and Hans love fanfiction, often there is a lot of character development. Since their initial relationship in the movie was so rocky, the fanfictions usually focus on how they overcome those initial negative impressions. For example, Hans might be written as having a change of heart more thoroughly and Elsa learning to trust again.
After the wedding, their relationship might start off rocky. Elsa would still be cautious about fully trusting Hans after his previous actions. Hans, on the other hand, would have to work hard to prove his loyalty. They might face challenges like dealing with the opinions of the people of Arendelle who are skeptical of their union. But over time, as they communicate more and face difficulties together, they could gradually grow closer.
Well, one possible plot could be that Hans has some hidden motives for kidnapping Elsa. Maybe he wants to use her powers for his own gain, like ruling Arendelle through her magic. He could hold her in a secret location and try to force her to cooperate.