If you have a look at the Voluntary Petition (VP) - WMIIC Statistical/Administrative Information (SAI), you will see that the Estimated Number of Creditors are in the ticked-off box 1 - 49 !
If you go to pg. 6 & 7 of this VP - WMIIC
LIST OF CREDITORS HOLDING 20 LARGEST UNSECURED CLAIMS, you will see that Stewart M. Landefeld EVP, on page 6 confirmed that there was ZERO, NULL, ZILCH Creditor and (smile, smile) on page 7 declared under perjury that he had read the foregoing List of Creditors (ZERO, NULL, ZILCH), see pg. 6 and that the list was true and correct ....
If you have a look at the VP - WMIIC, SAI, you will see that the Estimated Liabilities are in the ticked-off box $ 0 - $ 50,000 !
You are right that in the VP - WMIIC, SAI the Estimated Assets are in the ticked-off box $ 500,000,001 - $ 1 billion !
Perhaps they did it, if you wanna have a look at VP - WMIIC
Chapter 11 Debtors, so that they could mark the square "Debtor is not a small business as defined in 11 U.S.C. § 101(51D) !
To your "$40B hypothesis": Here is what I was writing in fact:
I was playing a little bit with numbers ... any idea about the value for every single WAMUQ - ESCROW if for example
$ 40,000,000,000 are acquired from dissolving parts of WMIIC ?
Next !