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.
Nightwings (novella)
"Nightwings" is a science fiction novella by Robert Silverberg. It won the Hugo Award for Best Novella in 1969 and was also nominated for the Nebula Award in 1968. It won the Prix Apollo Award in 1976. "Nightwings" is the first in a trilogy of novellas, the next two being "Perris Way" (1968) and "To Jorslem" (1969). These three works were later collected into a single fixup in three sections, also titled Nightwings. According to Silverberg's introductions, the changes required to turn the three shorter works into a novel were relatively minor.