VideoCardz reports ASRock revealed names of upcoming Z490 and H470 motherboards in the latest version of its Polychrome Sync application. In one of the file folders of the app, you can find data files that reveal motherboards based on the upcoming Intel Z490, H470, and W480 chipsets.
The 400-series uses LGA1200 and is designed for Intel's Comet Lake-S. There is one Creator motherboard that uses the W480 chipset, this one is intended for workstations. Next there's the H470 Steel Legend and H470M ITX AC, and here we have a bunch of Z490 motherboards: