Are you having second thoughts about the divorce? You sound healthily cynical about his ability to deal with his substance abuse issues so maybe not.
If you are hang onto your sentence:
"This man has done so much to me emotionally and I have been through the worst hell with him which is why i wanted out of the marriage."
You deserve much better than that.

Are you worried about the scene he is going to cause?
Before the court date, can you tell your brother to tell him (or tell him yourself) the divorce is going through whatever. That may discourage him.