I believe the fact that Ganthet and Sayd were embracing other emotions than willpower was the specific and direct reason for them being ousted. Everything else sort of added to it, but I think the exact reason the other Guardians gave was that the two of them weren't being impartial and emotionless anymore, which is the basis for the Guardians.The other Guardians wanted to rewrite the Book of Oa to allow the Green Lanterns to kill and for various other things during the Sinestro Corps War. Ganthet and Sayd objected, so the other Guardians booted them out. They warned Earth's GLs of the coming of Sinestro's forces, then went off to declare their love for each other and create the first blue ring. While the other Guardians embrace darker methods they would never have considered back in the day, Ganthet and Sayd embrace hope and become the blue corps' founders.
The Martian Manhunter has inflitrated the villains' ranks on the Salvation Run planet.
I fall in and out of comics but...
am I correct in assuming that the Black Laterns are gonna be a intricale part of the Final Crisis?
JGJ: We're going to lose some people we love, and we're going to maybe even find some people we thought we lost.
Good thing he isn't writing it then.