One possibility is that the re - found Fleija has been modified or altered in some way. Maybe it has new capabilities or is more unstable. This could lead to some very interesting plot developments. For example, if it's more unstable, there could be a race against time to either stabilize it or destroy it before it causes a massive catastrophe. And different characters with their own motives and agendas would be involved in this race, leading to a complex web of relationships and conflicts.
In such a fanfic, perhaps the rediscovery of Fleija could lead to a new power struggle. Different factions might try to gain control of it for their own purposes, like the Black Knights or the Britannian military.
Lelouch could be involved. Since he's always been at the center of power struggles in Code Geass, he might see the re - found Fleija as a tool to further his goals of overthrowing Britannia or protecting those he cares about.
She could start to reform Britannia from within. Kallen is a strong - willed character. If she joins Britannia, she may try to influence the system to be more just. For example, she could work towards improving the treatment of the Elevens within Britannia's hierarchical society.
In a Code Geass Akito the Exiled 5 years fanfic, perhaps Akito has become more powerful and is leading a resistance against the Britannian rule. He might have developed new Geass abilities or found new allies.
A fanfic could center around Cornelia's relationship with her sister, Euphemia. It could show their sisterly bond, their differences, and how they support or oppose each other in the complex world of Code Geass.
Perhaps in the fanfic, Code Geass technology somehow finds its way into George Washington's time. He could use it to outwit the British forces. For example, he might use a Lancelot - like mech to turn the tide of a battle. The story could also explore how his values would interact with the often morally gray world of Code Geass.
Fanfics often take on different genres as well. Some Code Geass Code Fanfic are action - packed adventures that take the characters on new quests outside of the original storyline. Others could be more of a mystery, where the characters have to solve a complex problem that was not part of the original plot. And then there are the ones that are more character - driven, focusing on the emotional growth and development of the characters.
One possible interesting plot could be a crossover where Mario, from the Mario universe, somehow gets transported to the Code Geass world. He might use his unique abilities like jumping and power - ups to help the resistance in Code Geass against the Britannian rule. Diesel could be some new type of mecha or vehicle in this fanfic that is created by combining the technology of both worlds. For example, Mario could use his plumber skills to fix the Diesel mecha when it breaks down during a battle, adding an unexpected yet fun element to the story.
Well, it could be about the restoration or recovery of certain elements in the Code Geass world. Maybe it's about recovering lost technology or powers. Fanfics often take the existing lore and expand on it. So this could be centered around a character trying to recover something important that was lost during the main storyline. It could also be about the recovery of relationships between characters that were strained or broken.
A fanfic about Cornelia could be a character study. It could delve into her past, like her upbringing in the imperial family and how that shaped her into the strong - willed person she is. Maybe it could also show her softer side that she doesn't often display in the anime.
In Code Geass fanfic, Nunnally is often a complex character. She is usually depicted as a symbol of innocence and hope. Writers might explore her relationship with Lelouch in different ways. For example, some fanfics might focus on how she would react if she knew all of Lelouch's secrets and plans. Her blindness also adds an interesting layer to her character, as it can be used to show her inner strength and vulnerability simultaneously.