Listings on Newegg, Data-Systems.fi, and Synnex (now taken down) detailed new Coffee Lake Refresh CPUs. Intel has yet to officially announce any new 9th-gen CPUs, but these listings give a good idea of what to expect from the Core i9-9900KF, Core i7-9700KF, Core i5-9600KF, and Core i5-9400F.
https://www.notebookcheck.net/Intel-s-new-Coffee-Lake-Refresh-CPUs-i9-9900KF-i-9700KF-i5-9600KF-i5-9400F-briefly-listed-on-major-retailer-s-sites.388131.0.html