What are some interesting plot ideas for Justice League and Batman Beyond fanfiction?

A cool plot could be that there is a rift in the multiverse that is causing chaos. Batman Beyond discovers it first and tries to get the Justice League's help. Along the way, they encounter alternate versions of themselves and have to work together to close the rift while also dealing with the differences and similarities between their various selves.

One idea could be a story where Batman has to lead the Justice League in a fight against a new, powerful and mysterious villain that can manipulate time. Another could be a fanfiction exploring the relationships within the Justice League when they are stranded on an uninhabited planet and have to rely on each other more than ever.

One interesting plot could be Batman's distrust of the Justice League's unrestrained power leading to a full - on confrontation. He might secretly plan to take down each member one by one, using his intellect and prep time. Another could be the Justice League being mind - controlled and Batman having to fight them to break the control.

A possible plot idea is that Batman discovers a dark secret within the Justice League that they are unaware of. This secret could be something that could potentially destroy the League or change their moral compass. Batman then has to decide whether to confront the League directly or try to fix the problem on his own, which causes the 'vs' situation as the League may see his actions as a threat.

One idea could be exploring Batman's initial reaction to being part of the Justice League in a 'Batman Begins' context. Maybe he's hesitant at first, still haunted by his past traumas from 'Batman Begins' and having to learn to trust these super - powered beings. He could be constantly assessing the League's motives and methods, which could lead to some internal conflicts within the team.

A cool concept could be a 'Batman Justice League fanfiction' set in an alternate universe where the League is formed much earlier in history. Batman has to adapt to working with heroes from different time periods and cultures, and they all have to figure out how to use their powers in a world that's not as technologically advanced as their own.

One idea could be a story where Batman has to lead the Justice League in a fight against a powerful new villain who can manipulate time. This would put Batman's strategic skills to the ultimate test as he tries to coordinate the different powers of the League members. Another plot could be that a member of the Justice League is secretly under mind control and Batman has to figure out who it is before they cause too much damage.

One idea could be that Batman discovers a hidden weakness in an enemy that's about to destroy the Justice League. He uses his detective skills to find a way to counter it and saves them at the last minute. For example, if the enemy has a device that can nullify the League's powers, Batman figures out how to disable the device.

A plot could revolve around a time when Batman is framed for a crime within the superhero community, and Wonder Woman is the only one who believes in his innocence. They work together to clear his name, all while uncovering a conspiracy within the Justice League itself. This would explore their trust in each other and their individual approaches to solving problems.

Well, it could be about the Justice League traveling to the future where Batman Beyond operates. Maybe they need his help to fight a new threat that has some connection to their past villains. For example, a villain from the Justice League's past could have somehow influenced events in the future and they need Batman Beyond's knowledge of the future tech and his unique fighting style to stop it.