At first, it might be a bit rocky. Spiderman is used to his own way of doing things, and Batman has very strict rules. But over time, they would start to respect each other. Spiderman would learn from Batman's detective skills, and Batman would come to appreciate Spiderman's agility and quick thinking.
Well, it could be that Batman sees Spiderman as a young hero in need of proper guidance. He might train Spiderman in more stealthy combat techniques, as Batman is known for his stealth. And he could also introduce Spiderman to his high - tech gadgets and resources, which would enhance Spiderman's crime - fighting abilities.
In the fanfiction, Batman might adopt the little girl because she shows extraordinary intelligence or a unique ability. For example, she could be a tech prodigy. This would attract Batman as he always looks for ways to enhance his crime - fighting capabilities. He would then have to balance his role as a father figure with his duties as Batman, which could lead to some interesting internal and external conflicts.
Wally is another key character. He has super - speed which makes him a very dynamic and exciting character. In this fanfiction, he is in a position to be mentored by Batman, which will likely lead to a lot of character growth as he learns from Batman's experience and discipline.
Well, perhaps Batman sees Superboy as a lost and powerful youth in need of guidance. He could take Superboy under his wing to teach him how to control his powers better and use them for good. Maybe they start by training in the Batcave, with Batman showing Superboy his high - tech gadgets and combat techniques.
Obviously, Batman and Jason are the main characters. Batman is the mentor and adoptive father figure, while Jason is the young boy who is being taken under Batman's care.
One possible storyline could be that Batman sees the potential in Shazam, who is still a bit of a naive hero. Batman takes him under his wing to teach him the more strategic and stealthy aspects of crime - fighting. For example, Shazam might be used to just using his superpowers to barge into situations, but Batman could show him how to gather intel first.
Another possible antagonist could be Doctor Octopus. His brilliant mind and powerful mechanical arms would give Iron Man and Spider - Man a tough fight. He might be after some technology that Iron Man has or be trying to prove his superiority in the scientific and criminal world, which would bring him into direct conflict with our heroes.
In such fanfiction, one interesting aspect could be how Iron Man mentors Spider - Man in the ways of being a superhero. Maybe he teaches him about advanced tech - based combat strategies that are unique to Iron Man's style.
Batman's brooding and serious personality would likely have a big impact on Shazam. Shazam is more light - hearted and naive, so Batman's influence could make him more cautious. For example, Shazam might not rush into battles as quickly.