Newsarama has a five-page preview to Final Crisis: Rage of the Red Lanterns. From their site:

The prelude to “The Blackest Night” begins here! They come from a place of great anger and hatred. They are the Red Lanterns and they will have their revenge against the greatest Green Lantern – Sinestro. That is, unless the Guardians have theirs first.

Looks pretty intense. Check it out.