AMD has been sharing important information in an investor presentation, including a roadmap for its upcoming processors. Next in line for release is the 2nd Gen Ryzen Pro Mobile, followed by the 3rd Gen Ryzen desktop processors. Making a surprise appearance at the end of the 2019 roadmap is the 3rd Gen Ryzen Threadripper CPU.
https://www.notebookcheck.net/AMD-Investor-Presentation-roadmap-features-3rd-Gen-Ryzen-Threadripper-CPU-and-launch-period-for-Ryzen-3000-series.413670.0.html