I think it's clear that should PTSC be forced (through a Court Order to PDS) to make good on some part of TPL's preexisting obligation to Brown, and if PTSC did not receive a disclosure or have reason to know of that preexisting obligation, PTSC will have a responsibility to it's Shareholders to bring suit or offset to recoup those monies.
If PTSC does not seek redress of that lost compensation, which in some ways I suspect they will choose not to publically do (for other reasons), but which I think they will have to address in a SEC filing, I think that it is likely that they would dangerously be inviting the fur to fly.
That's my FWIW view.