I got Green Lantern #0 - WARNING SPOILERS BELOW
Let me give a little context first, or the issue won't make any sense. You pretty much have to have been reading Green Lantern for the past few years as Green Lantern somehow survived getting rebooted in the New 52 universe (along with Batman).
The Guardians (Green Lantern's bosses) have pretty much gone crazy and/or turned evil. They have decided that free will is causing too much chaos in the universe. They plan to eliminate all the other color corps, as well as destroy their own Green Lanterns. They are going to raise new warriors as their so-called "Third Army." (I am assuming the Manhunters were their first army and the Green Lantern corps were their second army.)
The Guardians travel to a secret prison holding a being called "the first Green Lantern." It turns out the TFGL has been guarded by a group of Guardians for the past billion years because he is so powerful and unstable. The other-Guardians refuse to release TFGL and a fight ensues until the containment unit breaks and leader of the other-Guardians is killed. The Guardians take the TFGL away in his lantern-prison and lock up the other-Guardians.
Around this time, Sinestro (with a Green Lantern ring) and Hal Jordan (whose ring is empowered by Sinestro because the Guardians dismissed Hal) are fighting Black Hand on earth. The Guardians warp to earth and give Black Hand a power boost. He sucks Sinestro and Hal into his black ring, "killing" them. Before they get sucked away, Sinestro tells they must concentrate together to find a replacement not of the Guardians' choosing and leave a message on the ring.
The Guardians thank Black Hand and decide they will employ him to help "save the universe." They teleport him against his will to the secret prison. Black Hand can't stop them because his boss Nekron (a being powerful enough to withstand the Guardians) is dead.
The Guardians use the power of TFGL (much to his protests) to create the first soldier in their third army, which looks like a bluish zombie monster with no mouth. A police officer unfortunate enough to investigate the battle scene gets attacked by the zombie soldier, who transforms the police officer into a similar being like himself. In the process the police officer's heart pops out. The Guardians are satisfied as these soldiers have no mind of their own and blindly follow the Guardians' will. The Guardians then send one soldier out into the universe to create more soldiers and the other one is to create an army on earth.
Okay, now to the actual issue #0. Simon Baz is an Arab American who has fallen onto hard times. He was laid off at the auto plant and has been stealing cars to make money. As he is being chased by the police in his latest heist, he is horrified to find out that there are bombs packed in the back of the van he took. He drives the van back towards the abandoned auto plant and jumps out. The auto plant explodes
Baz is taken into custody as a suspected terrorist. (Apparently he gets taken into Guantanamo Bay or some place outside America.) He tells the interrogators he is a car thief but not a terrorist. During the interrogation we learn that Baz used to street race back in the day, but he survived a hideous car crash that killed his brother-in-law. (We now learn part of the reason Baz steals is to make money to help out his sister and her kid.) We also learn that the tatoo on Baz' forearms means "courage."
The lead interrogator decides to subject Baz to water-boarding. The second interrogator (Agent Fed - yeah, seriously) protests but reluctantly goes along with it. Apparently, the lead interrogator doesn't like Agent Fed, but can't get rid of him because he is on Amanda Waller's good side for some reason. Baz tries to resist getting waterboarded. Just as Agent Fed draws a gun on Baz to make him stop resisting, Sinestro's GL ring breaks in and chooses Baz. Baz busts out, much to everyone's shock.
Agent Fed reports to Amanda Waller about the incident, but she decides not to tell the Justice League. However, Batman intercepts this conversation and tells Cyborg.
Baz crashes someplace and is unconscious. His ring is glowing with a status notification of "message waiting." Meanwhile Sinestro and Hal are in a black and white place, confused to their whereabouts.