A tech - savvy kid who idolizes Spiderman in his 'Back in Black' state. This kid could start out as just an observer but then get involved in one of Spiderman's battles and end up helping him with some crucial tech - related problem. Maybe he hacks into a system that the villain was using to track Spiderman.
A mysterious figure from Peter Parker's past could return. Maybe it's an old friend or acquaintance who has some knowledge about the reason behind Spiderman going 'Back in Black'. This character could bring some emotional depth to the story as they interact with Spiderman and try to help him or perhaps even try to use his situation for their own gain.
How about a talking cat? The cat could have been a victim of the black cloak's magic but managed to retain some of its form. It could act as a guide for Serafina, using its knowledge of the manor's hidden passages and secrets that it learned before being attacked by the cloak.
A villain could be a corrupted version of a well - known Spider - Person. Maybe in one universe, a Spider - Person succumbs to the power they have and becomes a power - hungry tyrant who wants to control all the other Spider - Verses. They use their knowledge of the multiverse and their powers to create chaos and try to take over.
A character with the power of telepathy could be really interesting. They could either be an ally or an enemy. As an ally, they could help Batman read the minds of criminals to solve crimes faster. As an enemy, they could use their power to manipulate Batman's thoughts.
Lincoln Loud would be a great choice. He's the main male character in the show and could easily be the one to introduce the idea of 'Back in Black' to his family, maybe after hearing the song at school or from a friend.
There's also a possibility that a new, original villain could be introduced. For example, a scientist who was wronged by the superhero community in the past and now wants revenge. He could create powerful weapons and technology that can counter the superheroes' powers, and he uses the divide in the Civil War to pick them off one by one.
Peter Parker, of course, is the main character. He's Spiderman. And there are also his loved ones like Mary Jane. Also, his enemies play important roles too.
A healer from a remote tribe could be a great new character. This healer could have unique powers that are different from the magic we've seen so far in the series. They could come to the main city to offer their services during a plague or some other disaster, and get involved with Celaena and her friends.
A new character could be a young inventor who idolizes Spider - Man. This character could accidentally create a device that has the potential to be very dangerous in the wrong hands, and Spider - Man has to help him keep it safe.
An old ex - Auror who now lives near Hogwarts. He could have a past connection to Voldemort and some knowledge about the Dark Arts used in the Triwizard Tournament. He becomes an unofficial mentor to Harry, teaching him some unique spells and strategies that are not part of the regular Hogwarts curriculum. This character could bring a new perspective and a bit of wisdom to the story.
Miles Morales is the main character in the Black Spiderman story.