Most of the major superheroes have already a family. Not to mention some of them are also married and have children.
Superman has two cousins- Supergirl and Superboy.
Batman has his butler Alfred, four Robins including his real son and three Batgirls.
Captain Marvel has one sister (Mary) and one best friend (Freddy)
Green Arrow has Dinah, Connor Hawke, Roy Harper, Lian and Mia Dearden
Aquaman was married and had one son and has an adopted son Garth.
Wonder Woman has her mother and Donna.
Flash has a wife, one nephew, two grandchildren and two grandnephew/grandniece
So I wonder why Hal Jordan doesn't have a family yet? Green Lantern corps are just his comrades. Carol and Pieface are his friends. He doesn't even have a sidekick.