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.
Alternative versions of Robin
In the prequel comic of the video game "", Damian remains under the guise of Robin until Year Three where he becomes Nightwing. Although he will still become one of Superman's allies in his Regime. It is revealed in Year One that Dick Grayson's death at the hands of Damian Wayne was a mere accident because Damian was frustrated at Dick's lecturing him during a prison riot. In Year Two, Damian makes two minor appearances: once to alert Superman to Sinestro's arrival at the Justice League Watchtower, and again while Despero, having been assaulted by the Sinestro Corps, is crashing toward Earth. In Year Three, Damian attempts to defeat some villains and nearly gets killed but Dick Grayson, (now the new Deadman), saves him and gives him his old Nightwing costume as a birthday present, unaware to Damian or any other Regime members. Despite having severed ties with his father, Damian still greatly regards Alfred. Unknown to Damian, Superman, thinking Damian's “Nightwing” birthday gift is a set up by Batman, secretly sends Zsasz to kill Alfred before Damian arrives back at the Batcave. With Alfred gone, Damian now joins Superman's Regime. Batman, becoming aware of Superman's plan afterward, is too late to convince his son of the truth behind Alfred's death.