Although Hal Jordan and John Stewart are confirmed to be the primary heroes in the DCU's upcoming Lanterns series, other Lanterns could appear from Sector 2814. While Hal Jordan was the first Green Lantern, he's not the only human recruited into the Green Lantern Corps. Just like John Stewart who also became an accomplished officer in his own right, power rings have chosen a handful of heroes from Earth over the course of the DC Comics timeline.
https://screenrant.com/green-lantern-characters-dc-universe-lanterns-show/