I agree about the rehash and it'd be too much to redo "Emerald Twilight" etc. over a whole or half a season. If I had to do it, I'd make it a two-parter as a way to introduce Kyle - cold open in the alley of him getting the ring, we find out as he does what the heck happened to the GLC and confronting Parallax (it would not be how it was in the comics - too much story to sift through) - we find out Sinestro was behind corrupting Hal then Kyle, Green Arrow and maybe Alan Scott go save the day, restore the corps, free Hal, etc. End with Hal punching Sinestro in the face.