Right now, from his point of view, he's going to try everything to reel you back in - after all, that's 5 years of brainwashing efforts on his part to get you to be the downtrodden docile meek slave he moulded. So he's not going to want to start from scratch with someone new.
So, right now, he's being abusive - because in the past, it's worked on you right? When you hold firm, and he sees the abusive voicemails and bad-mouthing you to people aren't working, he's going to change tactic. He'll try overt romantic gestures, promise you a better relationship, promise to get counselling or he'll try to play on your innate kindness or concern for him by threatening to harm himself.
Do.Not.Waver. These are ALL tactics. They are ALL fake and only offered to reel you back in.
If he's capable of genuine change, why didn't he do that when he was clearly making you miserable?
If he's capable of being genuinely kind, romantic, why didn't he do that already?
And as for self harm - yes, he WILL threaten it, he might even do a half arsed attempt at it. But he's too much of a god in his own eyes to actually do it to himself. The only correct response for you if he does contact you to say he's going to off himself is to contact the emergency services, give his location and details and let them deal with him.
He will find another woman as soon as possible, if not already. She will likely be quite young, not very wordly, someone with no previous experience of relationships (or decent ones anyway) The reason is twofold for him - first one is to make you jealous, so prepare for him to flaunt this new relationship, and the second reason is that he needs someone to abuse now you are gone and in case he can't reel you back in.