Echo is the daughter of Batman and Catwoman, and younger sister of Damian. in the story "The Last Crime in Gotham" by Geoff Johns appearing in Detective Comics #1000. In a daydream of Bruce Wayne, the Waynes fought crime as a family, but crime had faded. Arkham had closed, Bane was in therapy, and Duela Dent had retired and named her newborn twins Batman and Robin. The family fought the Son of the Joker, who committed suicide.