Florence, one of Toby Rice Drews "Getting Them Sober" series covers this very topic. I think its volume 4. I just read it - the kindle version was really lousy and full of typos, but I got the gist anyway, and I needed the affirmation this month that I did the right thing.
It sounds like you are in the "in between" stage, or as I read somewhere, stuck in the hallway between one door closing and another door opening. It's dark in that hallway! But for right now, this is where you need to be.
Time will either give him enough rope to hang himself or push him into actions he hasn't taken before. But what that means for you is patience that more will be revealed. Patience is not my strong suit, but standing here in my own proverbial hallway, patience is my only viable option.
Hang in there,
~T
P.S. LOVED the superman analogy!