The boy could create a scenario where Red X is actually an undercover agent working for Batman. This would add an interesting twist to the relationship between the two characters. He might write about how Red X uses his unique skills to gather intel on the villains that Batman is targeting.
Perhaps the young boy's fanfic could focus on a team - up between Batman and Red X that is forced upon them. They initially don't trust each other, but as they face a powerful common enemy, they start to respect each other's abilities. The boy could describe their different fighting styles and how they complement each other in battle.
Another idea for the fanfic could be that the young boy is transported into the Batman universe. He befriends both Batman and Red X. He then tries to use his knowledge from the real world to help them solve a mystery that has stumped both of them. This would involve the boy having to understand the complex personalities of both characters and find a way to get them to work together effectively.
One possible fanfic could be about a young boy who idolizes Batman but then discovers the allure of the Red X character. He might start to create his own version of a hero who combines the mystery of Red X with the justice - seeking of Batman. For example, in his daydreams, he imagines himself using Red X's gadgets to outwit villains in Gotham City, while still adhering to Batman's moral code.
Maybe it's a tale where the boy gets caught up in a battle between Red X and Batman and has to help them resolve their differences.
Maybe it's a coming-of-age story where the 'red x' plays a significant role in the boy's growth and experiences. There could be adventures, challenges, and lessons learned along the way.
Perhaps a fanfic could focus on the relationships within the team. How Robin interacts with the other members of Young Justice, and how Ray fits into the dynamic. Batman's influence on Robin could also be explored, like how his training affects Robin's actions during team missions.
Perhaps in the fanfiction, the Red Lanterns see Batman as a potential asset. They manipulate events in Gotham to push Batman to his breaking point, causing him to embrace the Red Lantern power. Batman then has to figure out how to use this new power without losing his identity. He might try to reform the Red Lanterns from within, using his own code of ethics to influence them.
Another fanfic concept is that there's a threat in Gotham that has a connection to the Moon Kingdom's past. Sailor Moon travels to Gotham to investigate. There, she meets Batman, who is initially skeptical of her magical powers. But as they start to work together, they realize that their skills are complementary. For example, Sailor Moon's ability to heal could be useful for Batman's injured allies, and Batman's detective skills could help Sailor Moon figure out the mystery behind the new threat.
One idea could be a story where Batman and Superman have to team up to stop a powerful new villain who is using kryptonite - based technology. This would put Superman at a great disadvantage and force Batman to use his detective skills to find a way to neutralize the threat.
One idea could be that Batman has to team up with Ivy to save Gotham from a new, plant - based super - villain. They start off distrusting each other but gradually learn to work together as they realize the threat is bigger than their differences.
One idea could be a story where Batman has to face a new, more powerful version of Cheetah that has formed an alliance with some of Gotham's underworld. He has to use his detective skills to figure out her motives and weaknesses.
One popular fanfic could be 'The Adventures of the Young Red X'. It might follow the young boy as he discovers the powers and secrets behind being a Red X. He could have his own unique adventures, teaming up with other heroes or facing off against villains in a way that's different from the main storylines.