In a fanfiction, the Avatar State of Aang could be used in a more creative way. For example, Aang accidentally enters the Avatar State during a cultural festival. His friends are initially worried, but then they realize that in this state, Aang can communicate with the spirits present at the festival in a unique way. He learns secrets about the spirits and their connection to the human world, which he then uses to strengthen the bond between the two realms when he's out of the Avatar State.
One common theme is power control. Aang often has to learn how to handle the immense power of the Avatar State without losing himself. For example, in many fanfictions, he struggles with the sudden influx of energy and the potential for destruction it holds.
Well, 'The Mystery of Aang's Avatar State' is also a good one. In this fanfiction, Aang discovers some long - forgotten secrets about the Avatar State. It has a lot of character development for Aang as he explores the true nature of this powerful state and how it can be used for the greater good.
A good plot twist could be that while in the Avatar State, Aang is possessed by an ancient and malevolent spirit. His friends have to find a way to break the possession without harming Aang. This would create a lot of tension and force them to seek help from unlikely sources, like an old hermit who knows ancient spirit - binding techniques.
His relationship with Katara would be very different. He might be able to approach her in a more confident way, knowing what they've been through in the future. He could also avoid some of the misunderstandings that happened between them in the original timeline.
Well, he could prevent some of the great disasters that happened in his world. Maybe he could stop the Fire Nation's initial attacks and change the whole course of the war. He might also be able to save some important characters who died in the original timeline.
One idea could be a crossover where Ben 10's Omnitrix malfunctions near Avatar Aang's world. Ben and Aang team up to face a new threat that is causing chaos in both their realms. Maybe some of Ben's alien forms have unexpected interactions with the bending abilities in the Avatar world.
In Avatar: The Last Airbender, Aang and Katara's love story is a beautiful journey. Initially, they had different goals but were united by the need to save the world. Aang, being the Avatar, was a bit naive at first, and Katara was more mature. However, as time passed, Aang learned from Katara, and she was inspired by his determination. Their shared experiences, like fighting the Fire Nation, exploring different cultures, and facing personal losses, all contributed to their love. Katara's motherly side towards Aang also evolved into a romantic love as they both grew up, and in the end, they became a couple.
They could start as strangers who are initially suspicious of each other. For example, when Ben first arrives in the Avatar world, Aang might think he's a new kind of threat. But as they learn more about each other's powers and intentions, they begin to trust and cooperate. Ben could use his alien forms like Heatblast to help Aang in a fight against a fire - bending enemy, while Aang could use his air - bending to give Ben an advantage in aerial combat.
One great Aang fanfic could be one where he has to face an unexpected new threat in the Spirit World. It might explore his growth as the Avatar even further, showing his unique connection to the spirits and how he uses airbending in creative ways to overcome challenges.