The high-end Asus ROG Maximus line-up is rumored to be back with Z490 support this time around. Their allegedly leaked product info sheet indicates that it has multiple SKUs, which have PCI-Express 3.0, gigabit Ethernet, Wi-Fi 6 and Bluetooth 5.1. They are also DDR4-4800 memory-compatible.
https://www.notebookcheck.net/The-Asus-ROG-Maximus-motherboard-series-will-have-4-variants-new-leak.462107.0.html