One idea could be that Jack Frost discovers a new hidden power within himself while interacting with the Guardians. This power could be related to an ancient magic that the Guardians didn't know about. Another plot could involve Jack Frost having to prove himself to a skeptical Guardian who doesn't believe he's worthy of being part of the group. And a third plot idea might be that Jack Frost and the Guardians team up to face a new and powerful enemy that threatens the balance of the world they protect.
Well, perhaps in the fanfiction, Jack Frost gets lost in a different realm and the Guardians have to search for him. During this time, Jack discovers some secrets about his past that change his perspective. Or, there could be a plot where the Guardians are all affected by a strange spell, and Jack Frost is the only one immune. He then has to find a way to break the spell and save his friends. Also, a fun plot could be that Jack Frost challenges one of the Guardians to a friendly competition which ends up teaching them all something important about each other.
One idea could be that Elsa and Jack Frost discover they both have the power to control elements in a unique way. They could team up to save a magical world that is being threatened by a dark force that can nullify their powers. Another plot could be that they meet and initially clash because of their different approaches to using their powers, but then gradually learn from each other and fall in love.
The main characters are obviously Jack Frost and the Guardians. The Guardians typically include characters like North (Santa Claus), Tooth (the Tooth Fairy), Bunny (the Easter Bunny), and Sandy (the Sandman).
One interesting plot could be Jack Frost teaming up with Harry to fight a new, ice - based dark magic threat. Another is Jack being mistaken for a powerful, unknown wizard at Hogwarts.
One plot idea could be that Jack Frost is drawn to Elsa's ice powers. He visits Arendelle out of curiosity. They could start by being a bit wary of each other but then realize they can learn a great deal from one another about controlling and using their powers in new ways. For example, Jack might show Elsa how to have more fun with her ice, like creating ice sculptures that can move on their own.
A really interesting plot could be a time - travel one. Maybe Female Hiccup travels to Jack Frost's past or vice versa, and they have to adjust to the different time periods while also falling in love. Or perhaps there's a plot where they are both tasked with protecting a special, magical artifact that has the power to change the balance of their worlds, and they have to overcome their differences to succeed.
A plot could revolve around Elsa and Jack Frost having to deal with the unexpected pregnancy during a time of unrest in their respective kingdoms. Maybe there are enemies who see the baby as a threat and try to harm Elsa. Jack has to use his powers to protect her and their unborn child. They could also encounter a wise old sorcerer who gives them advice on how to control and enhance the baby's powers even before it is born. As the pregnancy progresses, Elsa learns more about her connection to Jack's magic through their unborn child.
Maybe Jack Frost loses his memory and ends up in the Fairy Tail guild. The members try to figure out who he is and where he came from while he starts to form new friendships and discovers new aspects of his powers. This could lead to a lot of humorous and heartwarming moments as he adjusts to the guild's chaotic but loving environment.
One possible plot could be that Jack Frost is corrupted by a dark force. He starts to spread winter not as a fun, playful season but as a harsh, unforgiving one. He might turn against the other Guardians, believing they are holding him back from his true power.
Well, perhaps Jack Frost accidentally enters Neverland while chasing a particularly strong winter wind. Peter Pan mistakes him for a new kind of fairy at first. Then they start to compete in various things, like who can fly faster (Jack using his ice - made wings and Peter with his pixie dust). But as they get to know each other, they realize they have a common enemy in Captain Hook, who wants to use Jack's ice powers to freeze the mermaids' lagoon and catch them easily. So they have to work together to stop Hook.
The character of Jack Frost in Rise of the Guardians fanfiction is alluring because he has such a mysterious background. His cool powers and his connection to winter make him a very interesting subject for fanfiction writers. They can play with his character traits, like his mischievous side and his kind heart.