The FDIC seized WMB and sold to JPM, despite it to be a solvent bank, blah blah blah we all know about it. JPM bought WMB for 1.9B plus some unknown amount. The "final price" was already determined and known since 2008.
WMI was forced to go bankrupted and liquidated. This is the only part that we don't know yet how much the trust can sell it for. It's likely to be closer to 10B than to 299B.