The POR document states (Pg 74) that once a more senior Tranche is satisfied in full (eg Piers), LTI's will automatically be redistributed to the next in line for payment (Equity).
I believe that any WMI owned assets returned (after the completion of the bankruptcy case) will be liquidated or cash received, at present, by the LT will be distributed to "Escrows" via those LTI's.
What I do not see is any, WMB originated, Cash/Assets returned by the FDIC to the LT as of yet, since I believe Bondholders will have to be paid simultaneously with or before "Escrow" holders.