Another concept could be the expansion of the world - politically and socially. The fanfic might delve deeper into the relationships between different countries and factions. It could show how the power dynamics shift after the events of the original series and how new alliances are formed or old ones are broken.
Some interesting concepts in 'Code Geass Sequel Fanfic' could include new character backstories. For instance, we could learn more about the minor characters from the original series and how their pasts shape their actions in the sequel. There might also be the concept of a hidden Geass order or organization that was not known before. This could add an element of mystery and conspiracy to the story. Additionally, the exploration of cultural differences between the different regions in the Code Geass universe could be fascinating. How do the cultures interact and influence each other? It could lead to interesting plotlines about diplomacy and cultural exchange.
The 'Code Geass Kallen Expansion Fanfic' is probably about taking Kallen's character from Code Geass and building on it. It could be a story that gives more screen time to her motives. Maybe it shows how she became so dedicated to the cause of the resistance. It could also detail her relationship with Suzaku from a different perspective. It might add more depth to her character by showing her making difficult decisions that were not shown in the original series and how those decisions shape her future in this fan - created expansion.
One interesting concept could be alternate endings for the characters. Maybe in the fanfic, Lelouch has a different fate than in the original series, like instead of his sacrificial end, he manages to find a way to rule Britannia without all the bloodshed. Another concept could be new Geass powers. For example, a character might develop a Geass that can control technology rather than just people.
One interesting concept could be how the time travel affects the existing power dynamics in the Code Geass universe. For example, if Lelouch were to travel back in time, he might use his knowledge of future events to gain an even greater advantage over Britannia. Another concept could be the alteration of character relationships. Maybe characters who were enemies in the original timeline could become allies due to the changes brought about by time travel.
Lelouch is often still a central figure. His complex character and his journey of trying to change the world make him a favorite to explore further in fanfics. Writers can take his story in new directions, such as showing his life after achieving his goals in different scenarios.
Well, in 'Code Geass Time Travel Fix It Fanfic', a cool concept might be the butterfly effect. When a character time travels, even the smallest change they make can have huge consequences. It could be something as simple as saving a single person who then goes on to change the course of an entire battle. Also, there could be the idea of self - discovery through time travel. A character might learn more about their own powers or purpose in life by going back and reliving certain events. And then there's the concept of rewriting history to create a better future for everyone, not just the main characters.
Some fanfictions in 'Code Geass the Gamer' might explore the idea of in - game items or loot. The characters could find or earn items that give them an edge in the Code Geass world, such as a device that temporarily enhances their Geass range or a charm that protects them from mind - control attacks.
A crossover might involve characters from different universes coming into the Code Geass world. Say, a character with superpowers from a superhero - themed anime enters the story. This could create a lot of chaos as Lelouch tries to either use this new element to his advantage in his fight against Britannia or has to deal with the unforeseen consequences of this new presence.
One interesting 'Code Geass Fanfic' could be about Lelouch having to face an unexpected new enemy that is immune to his Geass. It would add a whole new layer of challenge to his plans.
You can try looking for it on fanfic websites. Some popular ones include Archive of Our Own (AO3) and FanFiction.net. These platforms usually have a large collection of fanfics, so there's a good chance you'll find the 'Code Geass Kallen Expansion Fanfic' there.