A really cool plot idea could be a crossover of the technology in Hiccup's world with the magic of Rise of the Guardians. Hiccup might try to use his inventions to enhance the guardians' powers. For instance, he could create a device that helps Tooth Fairy collect teeth more efficiently. And in return, the guardians could help him protect Berk from some new threat that his normal dragon - based defenses can't handle. There could also be a plot where Hiccup's dragon Toothless has some sort of special connection with the magic of the guardians, like being able to communicate with them on a spiritual level which leads to some amazing adventures.
Well, sometimes in these fanfictions, there's a plot where Hiccup gets transported into the world of Rise of the Guardians. He then has to figure out how to get back home while also getting involved in the guardians' mission. For example, he might use his dragon - riding skills to help them reach a far - off place quickly. And his knowledge of different dragon species could be useful in dealing with some magical creatures in their world.
One interesting plot idea could be Hiccup befriending Jack Frost from Rise of the Guardians. Maybe they exchange their skills, like Hiccup teaching Jack about dragons and Jack showing Hiccup some cool ice tricks. Another could be that they team up to fight a common enemy that threatens both their worlds, like a dark force that can control ice and also enslave dragons.
Some fanfictions might have a plot where Hiccup is mistaken for a new Guardian. He has to prove himself worthy while also trying to figure out how he can get back to Berk. In this process, he could form strong bonds with the other Guardians. He might teach them about the importance of friendship with different species, like how he is friends with Toothless, and they in turn could teach him about their powers and the magic that keeps the world in balance.
North, also known as Santa Claus in Rise of the Guardians, could be an interesting character to pair with Hiccup. North has his workshop full of magical toys and elves. Hiccup could learn a lot about different kinds of magic from North. And North could be impressed by Hiccup's ability to tame dragons and might even want to have a dragon - powered sleigh for Christmas. Their interactions could be really fun to read about.
Some fanfictions might take a different turn and introduce new threats to the guardians. Picture a story where a powerful dark force from another dimension comes to their world. The guardians then have to find new powers within themselves and work together in ways they haven't before to defeat this new enemy.
You could write a fanfiction where Tooth Fairy has to go on a solo mission to a far - off land to retrieve a special tooth that has the power to restore the health of all the fairies in her realm. Along the way, she discovers new things about herself and her powers.
His character could also develop in terms of his understanding of different kinds of magic. He starts off knowing only about the magic related to dragons. But in the fanfiction, as he watches and interacts with the Guardians, he begins to understand their magic. This could lead to him becoming more open - minded and adaptable. He might start to think about how the different magics could work together to protect both his world and the world of the Guardians. And this new knowledge could also change how he approaches problems back in Berk. For instance, he could try to incorporate some of the Guardians' ideas or magic - like things into his dragon - training methods.
One interesting plot twist could be when a character from Burgess who was thought to be just an ordinary person turns out to have a hidden power that is crucial in helping the Guardians. For example, a young girl might discover she can control ice like Jack Frost, which was unexpected and changes the whole dynamic of their fight against the bad guys.
One interesting crossover could be the characters from Frozen interacting with the Guardians in a winter wonderland setting. Maybe Elsa's ice powers could be combined with Jack Frost's in some epic battles against a common enemy. For example, they could fight against Pitch Black together, with Elsa creating ice fortresses and Jack using his frost to make the ground slippery for the enemy.
In a fanfiction, the characters from 'Young Justice' could accidentally stumble into the realm of the 'Rise of the Guardians'. There, they are mistaken for enemies at first. But as they start to understand each other's motives, they realize they need to work together. For example, Superboy could learn a thing or two about controlling his powers from Jack Frost, while Jack Frost could learn about loyalty and teamwork from the Young Justice crew. This would be a great way to blend the two universes and explore different character relationships.
One idea could be exploring Pitch Black's past before he became the villain. Maybe he had a family or a lost love that led him down his dark path.
One idea could be exploring Jack Frost's past before he became a Guardian. Maybe he had a family or a life that he doesn't remember. Another idea is to create a new villain that challenges the Guardians in a different way than Pitch. For example, a villain who can manipulate time and mess with the memories of the children the Guardians protect.