If this decision holds up on appeal, this will be a major shift in NY law. Standing has always been deemed waived if not plead in a pre-answer motion to dismiss or initial answer. The decision might change that thought process.
"However, it has become evident that especially in the realm of foreclosure litigation that it would be a miscarriage of justice to continue to treat standing as a defense that can be waived.
Citimortgage, Inc. v Kagor Realty Co., LLC 2013 NY Slip Op 30003(U)