According to a PCI SSC Blog post, the Request For Comment (RFC) phase has started for the newest version of the PCI DSS. The draft can be obtained at the PCI Portal (https://programs.pcissc.org/) which QSAs, Participating Organizations (PO) and ASVs have access. The RFC phase began yesterday and continues though December 13, 2019.
I tried to find the documents in the Portal, but I am guessing that only the Key Contacts for organizations have access.