UPDATED AS OF JULY 2021
UPDATE: New Blog on PCI DSS 4.0
Get updates on the status on PCI DSS review of the 2019 RFC comments, when the final version of PCI DSS is planned to be completed, timing of the next request for comments (RFC), and information about the RFC feedback they received. The new blog covers timing of supporting documents, transition between PCI DSS v3.2.1 and v4.0, an explanation of “future-dated requirements,” development and transition timelines for the project and more.
Image source: PCI DSS site