Cathy, There is no set time limit on the stages. Replay can be anywhere from a year to possibly 3 or more, depending upon him facing his demons/issues, accepting that he was not at fault for whatever may have happened in his childhood, etc. I'm just estimating from what you've told me, but I'm almost certain he'll go another 6-8 months. Depression should be entering the picture now. Have you noticed any sadness on his face, what about his appearance? Check the eyes out, as they are the window to the soul.
Cathy, I can't emphasize enough the importance of turning your attention back on to yourself and your family. The more you try to analyze him, the crazier you are going to get. There is no way that you'll ever figure out what he's doing or thinking during this time because he is operating on emotions only. He's definitely not rational that's for sure. You have to let him go physically, mentally and emotionally so that he can heal totally. You have your own little journey to make right now and the door of opportunity awaits you. Yes, he is your husband, but there's not one thing you can do for him during this time, but be a friend and leave him out there to twirl in the wind.
There are many who will survive their crisis and come out the other side as mature, responsible, whole men/women. They may or may not bring back into their real life some of the "teen" traits that they picked up along the way back to earth, some of these traits may be good, some bad. If and when he wakes up and comes to you, then will be the time to decide whether you want him back. That will be your decision, not his.
Sit quietly, the answers will reveal themselves when you least expect them to. The past is gone, the present is a gift and you need to focus on today, allow the future to reveal itself when it is ready.