One idea could be exploring an alternate timeline where Aang fails to defeat the Fire Lord. Maybe in this timeline, the Fire Nation completely takes over the world, and the remaining benders have to go into hiding and plan a long - term resistance. Another plot could be focusing on a new airbender discovered long after Aang's time, and their journey to master airbending without the guidance Aang had.
You could write a 'the last airbender fanfic' about a group of benders from different nations coming together to form a new kind of bending art. They combine their skills and knowledge, creating something that has never been seen before. This could lead to conflicts with the traditional benders who don't like the idea of changing the established ways. It could also attract the attention of dark forces that want to use this new power for their own evil purposes.
A great plot idea could be a story that delves into the backstories of the minor characters in 'The Last Airbender'. For example, what was the life of the cabbage merchant like before he kept getting his cabbages destroyed? Or perhaps a story about how the Kyoshi Warriors were formed. You could also do a fanfic that shows the Fire Nation from an insider's perspective during the war, not just the villains but also the normal people caught in the middle.
One plot idea could be exploring an alternate timeline where Aang fails to defeat the Fire Lord initially. This would lead to a world dominated by the Fire Nation, and the remaining benders having to form a secret resistance. Another idea is a fanfic where Zuko and Katara's relationship develops in a very different way, perhaps they become rivals instead of friends. Or it could be about Toph starting her own earthbending academy in a far - off land, with new and unique students.
One idea could be the OC having to navigate through different elemental cultures within the Avatar world to gain the trust and love of the harem members. For example, if part of the harem is from the Water Tribe, the OC might have to learn their traditions and help with community issues like water shortages. Another plot could involve the OC having a unique bending ability that draws the attention of the harem. Maybe they can bend a new element or have a special way of using an existing one. This would make them both a target and a hero in the Avatar universe.
One plot idea could be that Naruko, with her unique abilities from her own world, gets transported to the Avatar universe. She could team up with Aang and his friends to fight against a new threat that combines the dark magic from her world and the Fire Nation's aggression. Another idea is that she has a special connection to the Avatar spirit, which helps Aang master some new forms of bending.
One idea could be a crossover with the Harry Potter universe. The Avatar characters could attend Hogwarts and learn magic while also using their bending abilities. For example, Aang could use his airbending to enhance his flying on a broomstick. Another idea is a crossover with the Star Wars galaxy. The benders could be like Jedis, using the Force which is somewhat similar to bending the elements. They could help the Rebels in their fight against the Empire.
One idea could be a crossover with 'Harry Potter'. The Avatar could visit Hogwarts and learn about magic there. Maybe Aang could teach the students about bending while learning about spells himself. Another idea is a crossover with 'Lord of the Rings'. The airbenders could fly over Middle - earth and help in the fight against Sauron. They could use their bending skills to create distractions or help in battles.
Well, you could write a fanfiction where the Sorting Hat in Harry Potter is actually an ancient airbending relic. In the story, it could have the power to sense not just a student's Hogwarts house potential, but also their potential as a bender in the Last Airbender world. Also, imagine a plot where Dumbledore was once an acquaintance of an old Avatar and learned some airbending wisdom from him, which he then uses to guide Harry in his fight against evil. And a third idea might be a fanfic in which the Marauders were secretly training in bending arts during their Hogwarts days.
One idea could be Teo's journey to master a new form of airbending that he discovers. Maybe he finds an ancient scroll that shows a different style of using air currents for both offense and defense. Another plot could involve Teo making friends with a group of non - benders and teaching them how to use technology in a way that can compete with bending. For example, they could build flying machines that are as fast as an airbender's flight.
Well, a cool plot might involve Naruto being transported to the Avatar world. He gets mistaken for a powerful bender at first. As he tries to figure out how to get back home, he helps the Avatar and his friends in their fight against the Fire Nation. Along the way, Naruto teaches them some of his ninja skills like stealth and quick combat moves, and in return, he learns about the different types of bending. Maybe there could be a big showdown where Naruto's Rasengan combines with Aang's airbending to defeat a huge threat.
One idea could be that the last dragon is discovered by a young adventurer. They form an unlikely bond and together they set out to find a way to save the dragon's kind from extinction. Maybe there are ancient prophecies or hidden magic involved.
A cool plot for 'the last kingdom fanfic' might be to have a character be transported back in time to a crucial moment in the kingdom's history. They would have the knowledge of what's to come but struggle to convince others to believe them. This could lead to all sorts of interesting twists. Or you could write about a character who is secretly training a group of women to be warriors in a society that doesn't really accept that. It would be about breaking gender norms and the challenges they face in a war - torn world.