In this fanfiction, the young justice team might encounter Gotham's unique villains. They could face challenges like dealing with the Joker's unpredictable madness or Penguin's devious schemes.
Obviously, the young justice members themselves will be there. And then, of course, Batman is very likely to show up. He is Gotham's main protector after all.
In this fanfiction, the Justice League might face Gotham's unique villains. Maybe they'll team up with Batman in new ways. For example, Superman could use his powers to assist in stopping a large - scale Arkham Asylum breakout that the local Gotham police can't handle on their own.
Obviously, the members of the Justice League like Superman, Batman, Wonder Woman, The Flash, Green Lantern etc. would be main characters. And in Gotham, we can't forget the villains such as the Joker, Penguin, and Catwoman. They are likely to play important roles as well.
One common theme is the interaction between the characters from Young Justice and those from Gotham Academy. For example, how the young heroes from Young Justice would fit into the school environment of Gotham Academy.
One interesting Young Justice Gotham City fanfiction could be about the team having to deal with a new villain that specifically targets Gotham's historical landmarks. This would bring in elements of Gotham's rich history and the unique skills of the Young Justice members.
Well, perhaps they go to the past to prevent a major disaster that has consequences in their present time. They could end up changing the timeline in unexpected ways. Maybe a character who was a villain in their time turns out to be a hero in the past they visit, which makes them question their own beliefs about good and evil.
In this fanfiction, the young justice team might encounter advanced technology in the future. They could face new villains who have powers based on futuristic concepts. Maybe they'll also meet their future selves and learn important lessons from them.
If Young Justice goes to Hogwarts in a fanfiction, they might form new alliances. For example, Superboy could team up with some of the stronger wizards like Hagrid. They could share their different kinds of strength. Superboy's physical strength combined with Hagrid's knowledge of magical creatures could lead to some really interesting adventures. And the wizards at Hogwarts would be both amazed and a bit scared of these new superhero visitors.
Another option is to check out Tumblr. There are a lot of fanfic writers and readers on there. You can search for relevant tags or join groups dedicated to Young Justice or Gotham Academy. Sometimes, writers will post snippets or links to their full fanfictions on their Tumblr blogs.