Well, 'The Dark Knight and the League' is a popular 'Justice League Watch Gotham' fanfiction. It shows Batman's complex relationship with the Justice League as they start to take a more active role in Gotham. A lot of it is about how Batman has to balance his own methods with the League's more out - in - the - open approach. Then there's 'Gotham Under the League's Eye' which is a really detailed fanfiction that delves into the political and social implications of the Justice League watching over Gotham. It's quite thought - provoking.
You can start by looking on popular fanfiction websites like Archive of Our Own (AO3) or FanFiction.net. Just use the search terms 'Justice League Watch Gotham' and you'll get a list of relevant fanfictions. Another option is to join fanfiction communities or forums related to the Justice League or Gotham and ask for recommendations there.
One popular type of fanfiction in this regard might involve the Justice League mentoring the Young Justice team. For example, in some stories, Batman could be seen teaching Robin more advanced detective skills while the rest of the League members impart their unique abilities and knowledge to the young heroes. This could lead to interesting character development for the Young Justice members as they strive to prove themselves worthy in the eyes of the League.
One interesting fanfiction could be where the Justice League members are magically transported to the Avengers' universe and they have to team up to fight a common enemy. For example, they might face a powerful cosmic entity that neither group could defeat alone.
One popular Justice League Marine Girl fanfiction could be about her joining the Justice League on a special underwater mission. Maybe she uses her unique aquatic powers to help the League fight an underwater villain that threatens to flood the surface world.
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.
Well, there are fanfictions that explore the relationships within the Justice League in the context of the Arkham Knight universe. For example, a story could be about how Batman's dark and brooding nature from the Arkham Knight game affects his interactions with the more light - hearted members of the Justice League like Flash or Green Lantern. It might show how they learn to understand and work with his methods better.
Well, there could be epic battles. The Justice League would bring their superpowers like Superman's strength and Wonder Woman's combat skills. Gotham villains such as the Joker would try to outwit them with his devious plans. Maybe Batman would be in a tough spot, having to choose between his loyalty to the Justice League and his own way of dealing with Gotham's rogues.
I really like 'Wonder Woman's Trial'. In this fanfiction, Wonder Woman faces a trial within the Justice League due to some misunderstandings. It's a great exploration of her character's integrity and how she stands up for what she believes in. The interactions with other Justice League members during this trial are really well - written.
One great 'Justice League' fanfiction is 'The New Recruit'. It adds a new character to the League and shows how they adapt to the team. Another is 'League in Crisis' which explores an alternate scenario where the League faces a threat from within. There's also 'Justice League: The Lost Years' that delves into what the members were doing during a period not shown in the official canon.
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.