One idea could be exploring the apprentice's backstory more in - depth. Maybe they have a hidden power or a past connection to a villain that they are unaware of. Another plot could involve the apprentice going on a solo mission and facing challenges that test their skills and loyalty to the team. They could also have an internal struggle with their identity as an apprentice and their own personal goals.
Well, a great plot for Young Justice Apprentice fanfiction might be a time - travel story. The apprentice gets sent back in time and has to interact with the younger versions of the heroes they know. This could lead to some really interesting character dynamics, as they try to keep their identity a secret while also trying to change or protect certain events in the past. Or perhaps the apprentice is given a task to train a new recruit who has a very different personality and set of skills, causing all sorts of comical and educational situations.
Maybe a story where some of the younger members of the Young Justice team are frustrated with the Justice League's methods and decide to take on a mission on their own, but end up getting in over their heads and have to call in the League for help. This could lead to a lot of character development and some interesting dynamics between the two groups.
One idea could be a crossover where the Young Justice team has to team up with the Justice League to face an interdimensional threat. Maybe a powerful villain from another dimension is trying to invade Earth and the combined skills and powers of both groups are needed to stop it.
One idea could be a misunderstanding that leads to a battle. Maybe a villain manipulates the situation so that Young Justice thinks the Justice League has turned evil. For example, the villain uses mind - control technology on some of the League members and Young Justice has to fight to save them.
One idea could be that the Young Justice team gets accidentally transported to an alternate dimension where the Justice League has turned evil. The Young Justice members then have to figure out how to reverse the situation while also evading capture from their once - heroes. Another could be a time - travel plot where the Young Justice team travels back in time and teams up with the early days of the Justice League to stop a threat that was thought to be long gone but has resurfaced in their own time. A third idea is that a powerful new villain emerges who can only be defeated by a combined effort of the Young Justice and Justice League, but first they have to overcome their differences in fighting styles and leadership.
One idea could be a misunderstanding that leads to a fight. Maybe the Justice League mistakes some of Young Justice's actions as being too reckless and end up in a battle. Then they realize they were wrong when a real threat emerges and they have to work together.
One idea could be a crossover between the two groups. Maybe the Young Justice team discovers a new threat that is related to the Runaways' past. They could team up to fight a common enemy, like a powerful villain who has been manipulating events from the shadows.
A great plot for Young Justice Invasion fanfiction might be to have the team deal with internal conflicts during the invasion. Maybe there are trust issues among some members because of secrets that come to light. For example, if a member was unknowingly related to one of the invaders. This would create drama and force the team to work through their issues while also fighting the external threat. Also, you could explore how the invasion affects the public perception of the young heroes. Are they seen as saviors or are people scared of them bringing more danger?
One idea could be exploring the characters' lives during peacetime. For example, how they adjust to normal life after all the battles. Maybe they start going to school like normal teens and facing typical high school problems while still having their superhero identities in the background.
Perhaps a character who was thought to be dead returns with a new mission and tries to recruit the Young Justice team for a greater cause. This could lead to internal conflicts within the group as they decide whether to trust this new/old ally.
One idea could be that the younger generation of heroes has to face a new breed of villains who have technology that can nullify their powers. They would have to rely on their wits and teamwork more than ever.