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.
Professor Night
Professor Night and Supreme have long enjoyed a professional partnership and are also close friends, fully aware of each other's secret identity. When visiting the Prism World of Amalynth, Supreme sometimes takes the Professor Night-inspired identity of Doctor Dark (a reference to Superman's Batman-like identity of Nightwing). If accompanied by a partner, such as Diana Dane, Supreme assigns them the Twilight-inspired identity of Duskwing (referring to the Robin-like identity of Flamebird)