Most of the various color corps stuff is indeed being covered in the 2 Green Lantern books. Sinestro and his corps have just teamed up with the GLC and the Star Sapphires in the latest issue of GREEN LANTERN.
And the Blackest Night is beginning to spill over into the other DC books as of last week's issue of DOOM PATROL. It's only getting bigger from here on out.
I've been really enjoying it so far. I love that we're seeing someone other than the Big Three taking center stage.
However, I do think the big climactic reveal in issue #4 had a bit of the wind taken out of it's sails by being spoiled in the press a few months back.