Depends on how mad he is and how much he wanted to spend. Honestly the cost just to file the action and having to hire a lawyer would probably run him anywhere from $500-$5000 depending on the state and if he had a lawyer friend willing to waste their time.
He could ask for an injunction that you don't play the songs and then they be taken down from any platform you have them on or he could ask for a portion of the money you're making not sure which way he would go. Wouldn't think this would succeed but you never know how a court might rule or what weird ruling a judge might make. (this is not legal advice, please do not take anything I have said as legal advice and seek a lawyer in your specific area for legal advice)
He could ask for an injunction that you don't play the songs and then they be taken down from any platform you have them on or he could ask for a portion of the money you're making not sure which way he would go. Wouldn't think this would succeed but you never know how a court might rule or what weird ruling a judge might make. (this is not legal advice, please do not take anything I have said as legal advice and seek a lawyer in your specific area for legal advice)