Alfred is also a great character in this context. He has to deal with the chaos that 'everyone meets the batfamily' would bring. He's the one who keeps the Batcave running and the Batfamily fed and taken care of. So seeing how he manages with a whole bunch of new faces around would be both humorous and interesting.
I think Alfred from the regular Batfamily could be a really interesting character in this fanfiction. He's used to dealing with the Batfamily's heroics, but when faced with the reverse Batfamily, his loyalty and wisdom would be put to the test. He might try to find a way to reconcile the two groups or at least keep the regular Batfamily from being completely corrupted by the influence of the reverse Batfamily.
Well, it could be a wild ride of different characters interacting with the Batfamily. Maybe there will be some unexpected alliances or rivalries. For example, a normal citizen suddenly finding themselves in the middle of a Batfamily mission and having to either help or get out of the way. It could also show how the Batfamily deals with so many different personalities all at once.
Well, in a 'batfamily meets reverse batfamily fanfiction', a lot of character development could occur. The members of the regular Batfamily would have to re - evaluate their own beliefs and methods when confronted with their opposites. Maybe they would start to question if there's a thin line between heroism and villainy. And the reverse Batfamily might also experience some changes, perhaps seeing a different path they could take from interacting with the 'good' Batfamily.
Batman himself is obviously a must - include. His leadership and skills are central to the Batfamily dynamic. Also, Robin, especially Damian Wayne as his complex relationship with Batman adds a lot of drama. Nightwing is popular too, with his acrobatic skills and his own journey away from being Robin. Batgirl, like Barbara Gordon, is often included for her intelligence and fighting abilities. And Alfred, the ever - loyal butler, who often provides support and wisdom to the family.
Batman and Superman would definitely have interesting interactions. Batman's more grounded, detective - like approach contrasted with Superman's super - powered idealism could lead to some great dialogue and moments of conflict and resolution.
Batman, for sure. He has such a complex relationship with the Justice League already. Meeting his family in this context would add another layer to his character. He's the bridge between the two groups.
Edward is also a fascinating character. His struggle with his vampire nature and his growing feelings for Bella can be explored in more depth in the fanfiction. Maybe we'll see new aspects of his character, like his relationship with his vampire siblings in the context of Bella being in their lives.
Gali from Bionicle could be an interesting character. Her calm and wise nature would contrast well with the often - chaotic human world. She could befriend a human scientist or philosopher. Another interesting character could be a street - smart human. This person could introduce Gali to the real - life struggles of humans, like poverty and inequality, and Gali could in turn share her values of unity and harmony with this human.
Definitely Harry Potter himself. His magic and his sense of right and wrong would bring a new dynamic to the Winchester world. And then there's Dean Winchester. His tough - guy attitude and his skills as a hunter would be really cool to see interact with Harry. Sam Winchester too, with his intelligence and research skills, could be very interesting when combined with Harry's knowledge of the magical world.
Hermione herself is always interesting. She has her intelligence, determination, and strong sense of justice. When she meets the Marauders, her reactions to their pranks and their more carefree attitudes would be great to explore. Also, Sirius Black. He has his own complex backstory, and seeing how he interacts with Hermione, a girl from the future, could be really engaging. He might see a bit of himself in her rebellious side.