I don't think anyone has the answer to that question yet but the law now DOES allow Prince to claim the masters to For You back. After repeating over and over how he wanted his masters back for the last 20 years, it's very unlikely that Prince won't do anything about it, and still... nothing filtered yet about as far as I know but I think we'll hear about it quite soon.

He told the Peach and Black Pod Cast hosts that he had the first few back already (that WB was giving them back at the 30 year mark).

Prince would have been able to file for the reversion of the copyright (it is not really about the physical mater taped but the right to copy them) in 2008. I am thinking he did. We will have to wait and see what happens.