One possible unique plot could be that Santa Baby gets lost in a time - warp and ends up in a different era. The Guardians have to team up to find her and bring her back. Along the way, they discover new magical elements and face off against an ancient evil that was awakened by Santa Baby's time - travel mishap.
A group of dark magic - using reindeer could be the main antagonists. Maybe they were banished long ago for misusing their magic, and now they've returned. They target Santa Baby because they know she's important to Santa and the whole Christmas operation. They try to steal her magic to make themselves powerful enough to take over the North Pole.
Perhaps they are guardians of a peaceful village that is suddenly under threat from an ancient evil. Naruto, with his experience in protecting his own village in the Naruto series, and Akeno, with her combat skills from High School DxD, must work together. They start by training the villagers to defend themselves, and then face the evil directly. Along the way, they might have to overcome differences in their fighting styles and personalities to succeed.
An OC who has the ability to see the past and future of the world related to the magic of the Guardians. This OC starts having visions of a great disaster that will befall the Guardians and the world if they don't change their ways. So, the OC tries to convince each Guardian to make changes, which leads to a lot of self - discovery for the Guardians and a new bond with the OC.
In a 'dying reader meets the Guardians fanfiction', it might start with the reader being in a desolate place, close to death. The Guardians come across the reader during one of their adventures. They feel a sense of duty to help. Groot, with his kind heart, might be the first to approach the reader. The story could then unfold as they take the reader on their ship, the Milano, and try to figure out how to heal the reader. This could lead to a series of events where the reader and the Guardians bond, and the Guardians learn more about the human condition through this encounter.
In this fanfiction scenario, Jamie could be kidnapped by a group of nightmare creatures who have broken away from Pitch's control. They might believe that Jamie holds the key to a new world order where nightmares rule. The Guardians would have to work together more closely than ever. North would use his workshop and his knowledge of the world to strategize. Bunny could use his tunnels to get to places quickly, and Sandy would send out his dream sand to try and communicate with Jamie in his sleep, all while trying to figure out how to defeat these rogue nightmare creatures and rescue Jamie.
One possible plot could be that Naruto is somehow transported to the Guardians of the Galaxy universe. He teams up with them to fight a common enemy, like a powerful new villain who is stealing chakra - like energy sources across different galaxies. Naruto's unique abilities, such as his shadow clones and rasengan, would be a great addition to the Guardians' combat skills.
Well, it could be that the guardians are learning about Jack's past through his memories. Maybe they discover things about his childhood, his fears, or his hopes. It might also show how his memories shape his present actions and relationships with the guardians.
Perhaps in this fanfiction, the guardians are watching Jack's memories to find a way to help him overcome some sort of trauma or problem. As they go through his memories, they might come across key events or people that are relevant to his current situation. For example, they could find out about a long - lost friend or a tragic event that has been affecting Jack's behavior. This exploration of his memories could lead to a journey of self - discovery for Jack and a deeper connection between him and the guardians.
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, it could be about the Avengers having to take care of a baby. Maybe they find the baby during one of their missions and have no idea what to do at first. They might struggle with changing diapers, feeding the baby, and making it stop crying. But in the end, they all grow to love the baby and it becomes like a little mascot for the team.