A fanfiction could also focus on the relationships between the characters. In the Injustice world, relationships are often strained due to the extreme circumstances. The Young Justice characters could bring a fresh perspective on friendship and loyalty. For instance, Robin could team up with Nightwing from the Injustice universe and they could share their different experiences and strategies, which could help them both grow as characters and also have an impact on the overall plot as they work together to fight against the tyranny in the Injustice world.
One idea could be exploring how the Young Justice team would react to the dystopian world of Injustice. For example, they might try to find a way to restore justice and balance without using the extreme methods seen in the Injustice universe. Maybe they would focus on rehabilitating the villains instead of just punishing them.
Another interesting angle could be a crossover of characters. Imagine Superboy from Young Justice meeting an alternate version of Superman from Injustice. They could have a deep conversation about power and responsibility, with Superboy trying to convince the other Superman that there are better ways to deal with the situation. This could lead to a series of events where the Young Justice team starts to influence the Injustice world in a positive way.
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.
I think Superboy would be really interesting. In Young Justice, he's still finding his place and dealing with his Kryptonian powers. In the Injustice universe, he'd be faced with a very different version of Superman. He could be a bridge between the two worlds, trying to understand the darker side of power that the Injustice Superman has embraced while also holding onto his own ideals from Young Justice.
One interesting idea could be the role reversals in relationships. For example, if in the original a male character was the leader, in the genderbend fanfiction, a female character might take on that role. This can lead to new power dynamics and character interactions.
One idea could be exploring the backstories of the lesser - known members in more depth. For example, you could focus on a character like Blue Beetle and his struggle to control the Scarab while also fitting into the team. Another idea is to create an alternate universe where the Justice League is evil and the Young Justice League has to oppose them. This would lead to some really intense battles and moral dilemmas for the young heroes.
One idea could be a crossover where characters from Arrowverse and Young Justice have to team up to stop a multiverse - threatening villain. For example, Green Arrow and Nightwing leading the combined forces.
One idea could be Goku arriving in the Young Justice universe due to a rift in space - time. He could initially be confused but quickly adapt and start training the young heroes, sharing his Saiyan techniques like the Kaio - ken.
One idea could be exploring new character backstories. For example, you could delve deeper into the origin of a less - known character in the Young Justice Z universe. Maybe they have a hidden power or a tragic past that has yet to be fully explored in the existing canon.
A cool Young Justice gamer fanfiction could revolve around a game tournament. The heroes participate in a high - stakes gaming competition where the loser has to face some sort of consequence in the real world. This could lead to intense rivalries and strategic gameplay within the story. Also, a story where the team discovers a hidden game level that holds secrets about their past or future could be really engaging.
One idea could be a time - travel fanfiction. The Young Justice Team gets sent back in time to the early days of the Justice League. They have to work in secret to fix a disruption in the timeline without being detected by their heroes - in - training selves. This would create a lot of interesting scenarios where they see the origin of the League and try to blend in while on their mission.