Obviously, Nightwing himself would be the main character as he's the one taking on the Batman role. Robin, if there's a younger Robin at the time in the fanfiction, would also be a key character. He might look up to Nightwing in his new role or have some doubts about him filling Batman's shoes.
Nightwing as the new Batman is the central figure, no doubt. But also, Alfred would be very important. Alfred has been with the Bat - family for a long time and he would be there to support Nightwing, give him advice, and maybe even nudge him in the right direction when he's struggling with his new responsibilities. And then there are the villains. Characters like the Joker or Two - Face would be main characters in the sense that they are the antagonists Nightwing has to face as Batman.
The main character is Nightwing turned Batman. However, Barbara Gordon could also be a significant character. Since she has her own connections to the Bat - family and is highly intelligent, she could be a valuable ally to Nightwing in his new role. Additionally, Damian Wayne, if he exists in the fanfiction's universe, would play an interesting part. He might initially be resistant to Nightwing as Batman but could gradually come to respect his leadership and new identity.
Batman is the most likely. He has a strong bond with Nightwing and would do anything to save him. His skills in combat and detective work would be crucial in finding and freeing Nightwing.
The Joker could still be a major villain. Even with Batman as a god, the Joker might find some twisted way to challenge him. Maybe he'd try to drive Batman to use his god - like powers in a way that goes against his moral code. Ra's al Ghul could also be a villain. He might see Batman's new godhood as a perversion of the natural order and seek to destroy him.
Well, obviously Batman and Nightwing are the main characters. Batman, the dark and brooding protector of Gotham, with his vast array of gadgets and skills. And Nightwing, the acrobatic and more light - hearted hero who was once Robin.
Obviously, Albus would be one of the main characters as the title implies he is the one who 'becomes' like Harry. And Harry himself would also be a central figure, either as a sort of inspiration or even in flashbacks.
One possible plotline could be Nightwing struggling to fill Batman's shoes in Gotham. He might face challenges like dealing with more dangerous villains who see him as a new target. Another could be his relationship with the other members of the Bat - family changing as he takes on the Batman mantle.
Hinata would be an important character as Naruto's wife. She could support Naruto in his Hokage duties and also play a role in the social aspects of the village. Their children might also be part of the story, representing the new generation.
The other members of the Bat - family like Robin, Nightwing, and Batgirl are likely to be main characters too. They would be involved in filling the void left by Batman in protecting Gotham.
Obviously, Batman would be one of the main characters. And of course, the other members of the Justice League like Superman, Wonder Woman, Flash, Green Lantern, etc. would also be important. There might also be some villains that are central to the story, such as Lex Luthor who could be plotting against the newly - formed alliance of Batman and the Justice League.
In addition to Batman, Superman, and Wonder Woman, The Flash could also be a main character. His super - speed would add an element of quick - paced action and his humorous personality would provide some levity. Aquaman, with his connection to the ocean and his trident, is also likely to be a main character. He can bring in a different perspective, especially when it comes to underwater or environmental threats. Green Lantern, with his power ring and willpower, would also be important as he has unique abilities that can be used in various ways to fight threats.
Obviously, Batman himself would be one of the main characters. And of course, his parents, Thomas and Martha Wayne. There could also be Alfred, as he is an important figure in Batman's life and might play a role in facilitating the meeting or providing some insights afterwards.