The War of the Green Lanterns continues with Green Lantern #65, and judging by the cover image of GL Extraordinaire Hal Jordan suiting up in Sinestro's yellow togs, we've got something of a doozy on our hands.
So far, we've had Krona letting the spectral entities possess the Guardians, Lyssa Drak sucking the candy-colored corps heads into the Book of the Black, John Stewart and Kyle Rayner dropping off the grid on Oa while Ganthet sacrificed himself to cover their escape, and Guy Gardner and Hal Jordan kicking the snot out of each other at the Green House before figuring out they had to remove their rings to avoid being re-possessed by Parallax like the rest of the GL Corps.
In these preview images below, we see how Hal and Guy are going to get off the planet they're stuck on, and DC tells us that they'll find John and Kyle as well and hatch a strategy that will be "one of the riskiest acts committed in the Corps' history." Unless that cover is a lie, Hal going back under the influence of the fear entity – the one that possessed him to kill the whole GLC once before – certainly qualifies.
Check out these images from GL 65, which is Part 4 of War of the Green Lanterns.