One great example could be a fanfiction where Batman and Superman team up to face a new, powerful villain that neither could defeat alone. They combine their unique skills, with Batman's strategic mind and Superman's super strength, to outwit the bad guy. Another example might be a story that delves into their friendship during their off - time, like when they have a friendly sparring session to keep each other on their toes. There are also fanfictions that explore how they support each other through personal crises, like when Superman has doubts about his place on Earth and Batman is there to offer his grounded perspective.