I'm not now nor have I ever been a huge fan of these giant story events that constantly pop up in both Marvel and DC. It seems like most of them are anticlimactic and usually interfere with the natural progression of the story. However some of them are written so well I have to overlook my personal issues.
For the last three years or more Green Lantern and Green Lantern Corps have been two of the most consistently well written titles in comics. For the last year or more it has been leading up to Blackest Night, a prophecy told in the book of OA and part of how Hal Jordan become a Green Lantern. Here are some pages from the upcoming first issue, Blackest Night #0 which will be part of the giveaway on Free Comic Book Day.