Sounds like he doesn't want to talk about his aftercare plan. That's his choice. (shrug)
He's going to be wrapped up in trying to remain sober and getting his life together for a while, I'm thinking. Are you able to detach and let him do that?
That, incidentally, is what Al-Anon is good for. It's not about them. It's about us. Finding clarity, setting boundaries, deciding what we want.
Hang in there,
GL