I know this. Being on the quest chain for green fire, or even having finished it, phased the raid. I know where the crack in the wall is, but you can't enter it. You just go through the green portal entrance, but no load screen. The game will not let you enter the raid. I've tried to enter the raid both solo, and as part of a group or raid. My warlock cannot enter the 25 man raid now that they have started the quest chain.