https://wccftech.com/amd-x499-platform-ryzen-threadripper-2019-launch-rumor/

While AMD allows their 2nd Generation Ryzen Threadripper processors to run on existing and refreshed X399 motherboards, rumor is that AMD will also offer the high-end X499 platform in early 2019.

The rumor comes from HD-Tecnologia who has revealed in an exclusive post that the AMD X499 will be arriving early next year but after the Intel X599 chipset which will support their Skylake-X core processors featuring up to 28 cores.