Ex plans on fighting me in court

So long story short, I left my abusive ex over a year ago. He told me if I left him he’d make sure I’d never see our son again. I left him and moved in with my dad and took our son with me. We battled in court for about 9 months over our son but I WON and got primary custody. I met someone new, by chance and we have the most wonderful relationship. Literally everything I’ve prayed for. Seven been together for about 9 months. I told my ex about the relationship and invited him to meet him since he was around our son (I’m trying to do the best I can go parenting regardless of our past). He told me he would only meet with us if he would be able to record us or bring his sister. I’m not comfortable with either because me and his sister have never gotten along ever. Regardless, my wonderful man has made a choice to buy a house for me and my kids and him. He bought this Beautiful ass house that I literally cry over. I alerted my ex that we will be moving. At my dads house I lived an hour from my ex, at our new house I live 1 1/2 hours away from him. It’s about a 30 mile change. I told him that our custody schedule will remain the same and nothing will be changing expect the fact that I’ll be moving, and it’s out of state. He texted me to tell me that he’ll never agree to the move and he’s gonna bring me to court if I go through with it. From your perspective do you think he actually has a case?