1122. Starfire and Nightwing would not be able to have a child, it would be impossible as they are two completely different species. However a Cadmus attempt at cloning Starfire, code named project “Nightfire” was discovered. They decided to bring the clone home and raise her as they’re daughter, Mar’i. Later they found that just like Cadmus’s other alien clones, they needed to supplement the alien DNA with human genes, the genetic materiel in question was spared from project “Batman Beyond”, specifically the sample labeled “Robin 1”.