 This is a departure from the original graphic novel "Gotham by Gaslight", in which no version of Robin appears.Robin is a major character in this 2019 film, and is heavily implied though never stated to be Damian Wayne.He is initially hostile to the Turtles after he finds them infiltrating the Batcave, but grows to like and respect them over the course of the film, and forms a bond of sorts with Raphael.