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.
Publication history of Dick Grayson
Dick returns to being Nightwing in his black and blue costume, starting with the "Rebirth" relaunch in 2016, and he will use his new skills and expertise in espionage moving forward. Nightwing is featured in two Rebirth books: the fourth volume of "Nightwing", his own solo book, and "Titans", where Dick teams up with the other original "Teen Titans" after Wally West returns to the universe; through Wally, Dick remembers events of his life in the new "DC Rebirth" timeline that resembles both of the pre-"Flashpoint's" and "The New 52's".