Bankruptcy Law Questions? Ask a Bankruptcy Lawyer.
I don't think those cases are relevant to your case.
Do you have non-exempt assets (valuable personal property or real estate other than your home) that will be surrendered to the Bankruptcy estate?
In all 3 cases, the problem was the lenders did not file Proofs of Claim, presumably because the lenders could not be located. Proofs of Claim will not be filed in your case, because there will be no assets in your case.
No - you cannot do that in a Bankruptcy court.
A Bankrutpcy will discharge your obligation to pay the mortgage, but will not make a determination that the mortgage is not valid, as whether or not the mortgage is valid is not relevant to a discharge.
To get a determination that your mortgage is invalid, you would have to file a case in state court.