Green Lantern: Beware My Power

Former Marine and Medal of Honor recipient John Stewart, struggling with civilian life after serving as a sniper in Afghanistan, witnesses Ganthet's spaceship crash nearby. Ganthet dies of his injuries, and the Power Ring he carries — previously owned by Hal Jordan — attaches itself to Stewart's finger. The ring flies Stewart up to the Justice League Watchtower,[a] where he meets Green Arrow, Martian Manhunter, and Vixen, who were monitoring a disturbance in space. With the Guardians of the Universe unresponsive and Jordan's apparent death, Stewart and Green Arrow use Ganthet's repaired ship to travel to Oa, which they discover in ruins and the Green Lantern Corps slaughtered. They encounter Thanagarian warrior Shayera Hol, who indicates security footage showing a Rannian ship docking at Oa just before the attack.