Keep your expectations at zero. I don't mean to rain on your parade, but he just might attend one meeting just so that you'll meet w/him and his lawyer. Time will tell on whether he will actually go to the AA meeting and will continue going.
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.