the residual interest goes to the successor in interest . In the case of WMI, that would be wmih now known as Mr. Cooper group.
Agree with your post except for this part. The wmilt has always been the sole successor in interest of wmi and wmiic. Wmihc now coop may be the successor company but all qsr and 10k filings after 2012 named the wmilt as the successor in interest. Not my opinion or words its whats in the docs. At least thats what i remember reading.