There are a million reasons why this wouldn't happen but Disney not seeing any value in the IPs is not one of them.
Batman by its lonesome is a property Disney would love to acquire.
Also the DC movies, whether you or critics love them or not, have been profitable which is all that really matters in the long run.
But the question is a co production meaning that both companies make the movie. Why would wb just give up Batman lol makes no sense. I never said DC isn’t profitable but they’re not the most profitable so again what does Disney have to gain other than making sure their competitor is makes more money