One underrated character is Commissioner Gordon. In a batman knightfall fanfiction, we could see more of his internal struggle as he tries to keep Gotham in some semblance of order without Batman. His relationship with the other officers and his decisions during this difficult time could be explored in great detail. Also, Killer Croc. He could be more than just a brute in the story. Maybe show his more human side during Knightfall as he tries to navigate the new power dynamics in Gotham.
Huntress could be a great choice. She has her own sense of justice and skills that could add an interesting dynamic to the Knightfall story. Another one is Azrael. He has a complex backstory and his presence during Knightfall could be explored more deeply.
I think Black Canary could be an underrated character to feature. She could bring her martial arts expertise and her connections in the DC universe. Also, the Question. His unique perspective and detective skills could make for an interesting addition to the Knightfall chaos in Gotham. He could be investigating the events from a different angle compared to Batman.
Agent Madani is also somewhat underrated. Fanfiction could show more of her backstory and how she really feels about working in a world full of crime and violence. She could be given more complex relationships with other characters, not just Frank. For example, her interactions with other law enforcement agents or even some of the criminals she has to deal with.
One underrated character is Black Widow. She has a wealth of spy skills and martial arts expertise. In Avengers Battleground fanfiction, she could be the one to gather intelligence on the enemies before the battle, and then use her combat skills to take out key targets during the fight. Another character is Quicksilver. His super - speed could be a game - changer on the Battleground. He could run circles around the enemies, delivering quick blows or stealing important items. And Bucky Barnes, the Winter Soldier, with his enhanced strength and combat training, could have some great storylines. Maybe he has to face off against some of his old enemies from his time as the Winter Soldier on the Battleground.
The Riddler could be included more. He's a very interesting character with his puzzles and mind - games. In fanfiction, he could be given more complex plots and challenges for Batman and Robin to solve. Another is Catwoman. She often gets overshadowed by the more flamboyant villains. Fanfiction could explore more of her ambiguous nature and her relationship with Batman in a deeper way. Also, Commissioner Gordon. He could be more involved in the action rather than just being the one Batman reports to. He could have his own investigations parallel to Batman's in fanfiction.
One underrated character is Agent Coulson. In another dimension, he could have some latent superpowers that are activated, and he becomes a key player in helping the Avengers. Another is Mockingbird. She has great combat skills and could be shown in a dimension where she has to lead the Avengers in a situation where the usual leaders are incapacitated. And then there's Sif. In a different dimension, she could bring some unique Asgardian knowledge and abilities that are crucial for the Avengers' survival.
One underrated character is Robbie Robertson. He could be featured more in fanfiction. He has a connection to the Daily Bugle and could be involved in a story where he discovers some secret about Spider - Man and has to decide whether to expose it or help protect him. It could add an interesting layer of moral dilemma.
Quicksilver could be one. In the movies, he didn't get as much screen time as he could have. In a multiverse fanfiction, he could be from a universe where his powers are even more enhanced and he plays a crucial role in a team - up. Another is Mockingbird. She has great combat skills and intelligence but isn't as well - known in the Avengers context. In a multiverse story, she could be a key figure in a different reality's Avengers.
Silena Beauregard is an underrated character. In fanfiction, she could be given more backstory and more involvement in the main plot. Maybe she could be brought back in some magical way and have a new role to play in the fight against the forces of evil. Also, the Stoll brothers, Travis and Connor. They are often just used for comic relief, but they could be developed into more serious characters in fanfiction. They are sons of Hermes, so they could have some really interesting stealth and thieving - related adventures that could tie into the main story.
Moaning Myrtle. She's central to the Chamber of Secrets story, but there's more that could be done with her. In fanfiction, she could have a more complex personality. Maybe she has some secrets of her own about the Chamber, or she could form an unexpected friendship with one of the main characters, which would change the dynamic of the story.
Hush is an underrated character. In a batman arkham beyond fanfiction, you could explore his backstory further and how he might be involved in the new events in Arkham. He could be plotting something big against Batman. Another character is Anarky. He has the potential to be a really interesting character in Arkham Beyond, with his anti - establishment views and his unique methods of causing chaos. You could write about his clashes with Batman from a different perspective.
Batman is of course one of the main characters. He is the central figure around which the story revolves. Bane is another major character. He is the one who causes Batman's downfall in a physical sense. Robin also plays an important role. He has to deal with the situation after Batman is incapacitated.