The equity interest in WMB went to COOP. Abandoned property (in this case the stock in WMB = Washington Mutual Bank) can be reclaimed at any time as far as I know.
So it is within the possibilities that COOP could reap the benefits of the LIBOR litigation (on behalf of WMB) IMO
COOP then would lose the NOLs, but of course it would be better to have some billions in cash instead of some NOLs...