Blackest Night #0 from the upcoming Free Comic Book Day 2009-

Page one, we've seen in previews, Hal talking about Darkness and light.
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Page two, standing at Bruce's grave
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page three, the flashback to an argument with Bruce
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Page four, Barry shows up
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Page five, Barry and Hal talks. Barry hasn't met Tim Drake yet, but he likes him when hearing how hopeful he is.
Page six, Hal and Barry talk about their respective funerals, Hal died a sinner, Barry a saint.
Page eight, clears up the Aquaman confusion, Hal reports that he's dead after being trapped as the Dweller, and calls his appearance in Final Crisis a rumor that was just that, a rumor. Shows Arthur Curry's Grave.
Page 10, Barry says Death isn't the end, they flashback to another League fight with Amazo. Barry says that something obviously pried the gate to death open, and if there's an escape, Bruce is figuring it out.
Page 12, talks about J'onn dying, Hal talks about J'onn being the heart and soul of the league, and says he's dead and so is Bruce. And apparently Barry and Bruce used to talk late into the night about crime research.
Page 14, flashback to Hal and Bruce talking about their parent's deaths, Barry and Hal are all like, these guys (Bruce and J'onn) were our friends. Barry says he won't stop hoping that they'll find their way back like Barry and Hal did.
Page 15, images of Sue Dibny, Ralph Dibny, and Ronnie Raymond's grave, as Black hand seemingly starts to raise the dead. For some reason, a shot of Carter, Kendra, and Ray Palmer is in there.
Page 17, Black hand finishes the black lantern oath*, scar is smiling
page 18, a letter from Geoff Johns.

Omitted pages were ads

The following are the pinups of the various Corps

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*the blackest night
falls from the skies
the darkness grows as all light dies
we crave your hearts and your demise
by my black hand the dead shall rise

Warning, Spoiler:
SPOILERS!