Nightwing
Although Nightwing is commonly associated with Batman, the title and concept have origins in classic Superman stories. The original Nightwing in DC Comics was an identity assumed by alien superhero Superman when stranded on the Kryptonian city of Kandor with his pal Jimmy Olsen. Drawing inspiration from Batman and Robin, the two protect Kandor as the superheroes Nightwing and Flamebird. Following the Crisis on Infinite Earths continuity reboot in 1985, Nightwing was re-imagined as a legendary vigilante from Krypton whose story inspires Dick Grayson's choice of name when he leaves behind his Robin identity.
Nightwing
Discussing why he likes the character and signed on for the project, McKay cited the character's showman personality and background as an entertainer and expressed his excitement for depicting that in the film. He later stated that he wants to introduce a complete adaptation of the character, something that hasn't been done in previous film interpretations of him before. McKay continued to state that the director-driven approach is why he loves Warner Bros., and how the franchise is differentiating itself from other popular shared universes. In an interview with Cinemablend, McKay confirmed that the film would acknowledge the titular character's past from the source material, including his time as a part of Haly's Circus, and also reaffirmed that the film will be a straightforward action movie with minimal use of CGI special effects and grounded realism.Barbara Gordon appears as Nightwing alongside Batman in the "Smallville" "Detective" story arc of the "Smallville: Season 11" series. This role was originally to be filled by Stephanie Brown, but DC editorial withdrew permission to use the character after her appearance had already been announced and solicited, necessitating Gordon again replace her. After Barbara is recruited by the Green Lantern Corps as a Blue Lantern, she asks her boyfriend, Dick Grayson, to be her successor as Nightwing and thus becoming Batman's replacement partner. Unlike previous depictions, Dick was never Bruce Wayne’s ward and protégé as Robin, and was made reference that he was a former circus acrobat-turned-police officer who works for Gotham City Police Department.
A Nightwing ride is currently in operation at Six Flags New England.