In a 'Justice League meets Robin' fanfiction, Robin could show off his amazing acrobatic skills to the Justice League members. They might be impressed and start to see his potential as a valuable addition to their team. Maybe Robin would help Batman communicate better with the other League members, as he often understands Batman's thinking.
In a 'Justice League meets Robin' fanfiction, Robin is definitely one of the main characters. He is the link between the dark world of Gotham and the grandeur of the Justice League. The members of the Justice League are also main characters. Batman is an important one as he is Robin's mentor. Superman, with his incredible strength, will be there. Wonder Woman, with her grace and power, would be involved. Flash, known for his speed, Aquaman ruling the seas, and Green Lantern with his power ring - all these characters will interact with Robin and shape the story.
The Riddler could be a great antagonist. He might have a grand scheme that not only affects Gotham but also has implications for the Justice League's interests. His riddles could stump both Robin and the League members, forcing them to work together to decipher his plans.
Well, it could be that baby Robin's presence brings out a softer side of the Justice League. They might start doing more community - based activities suitable for a baby, like visiting orphanages or hosting baby - friendly events. And baby Robin could be the little mascot that unites them even more. Maybe he'd have some cute interactions with the Flash, like trying to catch his lightning - like speed.
In this fanfiction, Robin is the central figure who is about to meet the Justice League. The League members such as Superman, who has super strength and can fly, will be important. Wonder Woman with her combat skills and magical weapons is sure to be there. Flash, the super - fast hero, will also play a role. Batman, as Robin's mentor, might have a special role too. Maybe he's the one who arranges for Robin to meet the League or he's there to keep an eye on Robin during the encounter. Aquaman could also be included if the story has an underwater or coastal - related plot. All these characters together with Robin will drive the story forward.
Well, in such a fanfiction, there could be an epic battle scenario. Maybe the Justice League initially mistakes Red Robin for a threat. Then, after some intense action, they realize he's an ally and they team up to face a greater common enemy, like a powerful new supervillain.
One idea could be that Robin is on a solo mission when he accidentally stumbles into a Justice League operation. He then has to prove himself to the League members and ends up joining them for that particular mission. Another could be Robin discovers a secret about a member of the Justice League that puts him in a difficult position of whether to expose it or not.
Batman would be very strict and vigilant about baby Robin's safety. He'd constantly be checking on him. Superman, on the other hand, might use his powers to amuse the baby, like flying around with him gently. Wonder Woman could be like an aunt figure, teaching the baby about courage and honor in simple ways.
I think the interaction between Red Robin and Batman would be the most interesting. Since Red Robin is Batman's protege, seeing how their relationship plays out in the context of the Justice League would be cool. Maybe Batman would be more protective or more critical of Red Robin in front of the other League members.