You could write a fanfic where Alex Rider goes on a mission in a completely new and exotic location, like the hidden valleys of the Himalayas. There he could face new challenges and encounter unique cultures.
One idea could be to explore what would happen if Alex Rider had to team up with a former enemy. Maybe they discover they have a common foe and must put aside their differences.
Another interesting angle is to write about Alex Rider's life after he retires from his spying career. How does he adjust to a normal life? Does he still get involved in some small - scale mysteries?
You could write a fanfiction where Alex Rider has to go undercover in a school as a normal student, but he discovers a secret society within the school that is involved in some sort of illegal activity. This would be a different kind of mission for him, as he's used to more international espionage. He would have to use his wits and skills in a more confined and familiar setting.
Another idea is a fanfic where Alex Rider and Yassen are on a mission together to retrieve a powerful weapon. They face many obstacles along the way, and their different approaches to problem - solving lead to both conflicts and moments of cooperation. As they progress, they start to respect each other more.
One idea could be an Alex Rider crossover with James Bond. Alex could be recruited by MI6 to assist Bond on a mission. They would bring their unique skills together, with Alex's youth and agility complementing Bond's experience and suave charm.
One idea could be Alex having to solve a mystery within the high school. Maybe there are strange disappearances of students during a school event. Another could be that he discovers a secret society in the high school that is involved in some illegal activities. Or perhaps he has to deal with a new teacher who is actually a villain in disguise.
Maybe in the fanfiction, Wolf is actually an undercover agent sent to protect Alex Rider without his knowledge. As they interact, there are misunderstandings at first. Alex thinks Wolf is a threat, but then they discover a common enemy. Their relationship then develops into a strong alliance as they work together to take down the bad guys, with Wolf teaching Alex some of his more unorthodox combat techniques along the way.
Some of the top Alex Rider fanfics include 'Alex Rider: The Lost Files'. This fanfic reveals secrets and events that were only hinted at in the original series. 'Reborn as Alex Rider' is an interesting take where the story is reimagined from a different perspective, like if someone else was in Alex's shoes. 'Alex Rider's Unfinished Business' is great too. It picks up on loose ends from the books and weaves them into a new and exciting narrative, making it a must - read for Alex Rider fans.
Another concept could be that Alex is an amnesiac who has a connection to one of Batman's old foes. Batman tries to help Alex regain his memories while also protecting him from the bad guys who are after Alex because of his potential knowledge.
One idea could be that Alex Rider is sent on a mission to Hogwarts undercover as a new student. He discovers the wizarding world while also trying to complete his MI6 task, which could be related to some dark wizard who has ties to a Muggle criminal organization. Another plot could be Harry Potter and his friends accidentally stumbling into one of Alex Rider's missions in the Muggle world and having to help him out using magic in a very discreet way. A third idea is that Alex Rider is revealed to have some latent wizarding abilities and he gets recruited by Dumbledore to help in the fight against Voldemort, bringing his unique set of spy skills to the wizarding war.
One plot idea could be that Brittany and Alex are in a small town and they discover a hidden treasure map. They then embark on an adventure together, facing various challenges and growing closer as they search for the treasure. Along the way, they might have to outwit some local villains who also want the treasure.
Well, a cool kamen rider mlp fanfic idea could be about a Kamen Rider who has lost his memories and ends up in Equestria. The ponies help him regain his memories while he uses his combat skills to fend off various villains that start showing up in their land. Or perhaps a fanfic where a magical pony creates a special armor for herself inspired by the Kamen Rider suits, and she becomes a hero in both the pony world and somehow gets involved in the Kamen Rider's battles in his world. There could also be a story where a group of ponies are sent to the Kamen Rider's universe and they have to learn how to adapt and fight alongside the Riders.