The only open Claims I know of are the Employee Claimants claims. These claims hinge around Change in Control "CIC".
Change in Control is remedied with "the Final Payment" for "WMB and it's assets" because CIC and ownership happens when "the Final Payment" for "WMB and it's assets" is completed.
Therfore when the FDIC makes "the Final Payment" for "WMB and it's assets" the CIC can be settled. Employee Claimants can file a CIC Summary Judgement for THJMFW to sign and close the issue.
The GSA that the FDIC is party to is a Settlement, and is governed by "Six Year Rule", or the "Contractual Statute of Limitation".