Maybe or DC is reducing the presence of the other lantern corps and want to dissociation the Human lanterns with those corps. I thought it was weird how Kyle was introduced as a green lantern in omega men when we last saw him as a white lantern. How did he get a green power ring? Same with Guy, but I don't remember if Guy kept is green power ring after becoming the lead of the red lantern book. Then there's Lobo killing off lanterns from the other crops. Could be an error but Idk.