Batman is NOT trans, but the Bat-family is EXTREMELY trans-friendly. And, well, we might have lied. Batman isn't trans on Earth Prime--but the multiverse is infinite.
In this classic episode from Stephenie's early explorations of gender identity through comic books and superheroes, we discover that for Batman to overcome his trauma and become Batman at his strongest, his smartest, his best, the hero we know and love might have relied on gender-affirming therapy as much as the next person.
See also "
You’ll Never Look At Batman The Same Way Again", an article covering the comic book story in which Batman forcibly injects a woman with testosterone to save her life. You'll never guess the identity of the woman he saves!