It enhances the series by adding more content. Simple as that. More stories mean more gameplay time and more things to discover about the Arkham world.
Well, in Batman Arkham City, before the story really kicks off, you should definitely check out the rooftops. They not only give you a great vantage point for scoping out the area but also sometimes hide small caches of upgrades. Another important area is the sewers. They are a bit gloomy but are filled with things to find, like Riddler trophies. And don't forget about the side alleys in the Old Gotham section. They can have some interesting interactions and items that can give you an edge as you start the main story.
One possible aspect of a Batman and Harley fanfic in the Arkham universe could be their complex relationship. Batman is always trying to uphold justice, while Harley is often caught between her love for the Joker and her own sense of right and wrong. In a fanfic, the author might explore how Batman could potentially save Harley from her self - destructive path. For example, Batman could use his detective skills to show Harley the truth about the Joker's abuse towards her.
One of the best moments could be when Batman manages to outwit Harley in a battle of wits. He uses his knowledge of her psychology to predict her moves. For instance, if Harley tries to set a trap using her knowledge of Arkham's layout, Batman quickly figures it out and turns the tables on her.
One possible fanfic could be centered around Batman's encounters with Poison Ivy within the Arkham universe. Maybe it could explore their complex relationship, with Batman constantly trying to stop Ivy's environmental extremism while also seeing the good in her intentions at times. For example, Ivy might be trying to protect a particular area in Arkham City that she believes is crucial for nature, and Batman has to find a way to balance the law and her motives.
The Batman Arkham games generally follow Batman's fight against Gotham's villains. He battles the likes of Joker, Scarecrow, and others. In Arkham Asylum, the inmates take over the asylum. Batman has to fight his way through and deal with Joker's various schemes. In Arkham City, a large part of Gotham is turned into a prison, and Batman has to survive in this dangerous place while trying to stop Hugo Strange and other threats.
The Batman Arkham series has a complex and engaging story. In it, Batman battles a host of his most iconic villains in Arkham Asylum, Arkham City, and Arkham Knight. He faces off against the Joker numerous times, with the Joker's chaotic and evil plans always pushing Batman to his limits. There are also other villains like Scarecrow who uses fear toxin to terrorize Gotham.
It's an action-adventure game that shows Batman's early years. He faces off against various villains in Gotham City while trying to establish his reputation as a crime fighter.