From the DC "New 52" Panel at SDCC (via Newsarama):
Savage Hawkman #0 is "the culmination of what we've been doing all spring and summer" says Liefeld.
"At the end of 0 and into 13 he finds out his truth, which is something he has to deal with the consequences of. he's a wanted felon in the Universe, and Deathstroke, Red Hood and the Outlaws, Green Lantern, and others will be after him."
So now Green Lantern is in the mix? I'd really like to see the Nth metal matched against a power ring! Nth metal traditionally could effect the 4 fundamental forces of the universe; what would it do against a Lantern construct? (My answer: Shatter it into a million pieces, of course!)
The hits just keep on coming, so more news as it becomes available!