A slide from Gigabyte's internal presentation has leaked and it shows that the AMD X570 chipset will be launching at next year's Computex. The X570 chipset will support the Ryzen 3 CPUs and also bring support for PCI Express Gen 4. The presentation also indicated information about Intel's next HEDT CPU, Glacier Falls, and new Intel chipsets — the B365 and H310C. It also mentions 'KF' variants of the 9th gen CPUs such as the Core i9-9900KF, Core i7-9700KF, and a few non-K variants such as the Core i5-9400F and the Core i3-8100F.
https://www.notebookcheck.net/Leaked-slides-reveal-AMD-X570-chipset-s-launch-at-Computex-2019-and-hint-at-new-Intel-9th-Gen-Core-KF-variants.373411.0.html
If there is no iGPU, I's assume they would be called DK since the D series chips have had reduced or absent graphics