Originally Posted by
king of hybrids
they left the fear-bug alive, and now separate from sinestro, for a reason beyond merely johns wanting to use them in FE. if i was to guess, i'd say the dimming might have left parallax weak enough that if he goes into hal again, he won't be able to separate from him or dominate him, so it reverts back to a combo of original flavor parallax and johns' stuff.
or heck, some remnant of all the rings that have gone through hal would probably do a number on his sanity under the right circumstances