Hal, John, and Simon would be killed off. Hal is the veteran that died saving the universe. John retired from being a Green Lantern and living a quiet peaceful life on a farm after saving the universe along with the late Hal. Simon is the rookie that got himself killed for being too cocky.
Guy, Kyle, and Jessica still alive but with a soft retcon to reduce their age and experience. Guy is the veteran among them but has only been a Green Lantern for 4 years. Kyle is a 1 year veteran. Jessica would be the rookie,
Parallax Hal is still around and he can be like the "Cyborg-Superman" for the Green Lanterns.
Bendis's token black Green Lantern doesn't exist.