So the Green Lantern Corps is a pseudo-army/police force patrolling almost the whole universe. There are about 7200 of them. And they patrol the whole universe.
Now, they do have the power of the Green Lantern ring on their side, a extremely powerful weapon that, as long as it's charged, will generate energy constructs of anything the wearer can imagine for as long as they can concentrate no it.
Insanely overpowered? Considering their jurisdiction, not really.
Green Lantern Corps focuses on the other members of the Green Lantern Corps, obviously, and in the introductory arc, Green Lanterns Guy Gardner and John Stewart begin by reminiscing about their time as Lanterns, before being called to an emergency meeting on Oa. There's a mysterious threat out there that can overwhelm the power of the Green Lantern ring, and this enemy also seems to be using green energy constructs, too. However, the Guardians of the Universe, the being who created the GLs in the first place, are becoming more insular, paranoid, and despotic, so the regular Lanterns have to figure out how to deal with a powerful threat while their leadership becomes less and less trustworthy and caring about individual members of the Corps.
The first and third issue of this arc were the best, with good characterization (in the former) and good action as a small band of reinforcements fight a holding action against this green horde (in the latter). However, having the Guardians become more and more dickish, a trend that has been more and more common since Geoff Johns revitalized Hal Jordan, and it's one I really dislike.
No, wait. That's not strong enough.
I really fucking goddamn hate it.
The Guardians are supposed to be wise but alien, protectors of the universe, the good guys for crying out loud. Unfortunately, a cheap way to force tension is to have the regular troops be at odds with their superiors. It's lazy writing, and it's even lazier writing to make the superiors so obviously evil.
However, I still think Green Lantern Corps is the best of the GL books in the new 52. I just wish the Guardians weren't being even more villainous than the nominal threat of the opening arc. Also, I want more focus on the actual Corps, rather than just a few main characters. Maybe that'll happen later on.
Aaron "The Mad Whitaker" Bourque; also, the Green Lantern Corps shouldn't be the universe's police officers, but more like knights-errant under a centralized organization.