The online handle of Bruce Wayne, a fictional character known as Batman, may vary depending on the specific portrayal or story. In most depictions, Bruce Wayne maintains a secret identity to protect his crime-fighting persona. As a result, he typically does not publicly reveal an online handle associated with his alter ego.
However, it's worth noting that in certain storylines or adaptations, Bruce Wayne may use various aliases or handles when operating online. For example, in the Batman: Arkham video game series, he is sometimes referred to as "The Dark Knight" or "The Bat." In other instances, he might adopt more covert names to maintain anonymity.
Ultimately, the choice of an online handle for Bruce Wayne is subject to interpretation and can vary across different media and narratives.