OK, so let's recap everything we've learned so far.
Fall 2019: Frost Canyon is your regular 4x4" NUC, powered by 25W Comet Lake-U chips (Intel UHD graphics). An updated Akasa Turing is a given.
2019-2020: The gaming-oriented Ghost Canyon is the successor to the current Hades Canyon, with the 45W i9-9980HK onboard. The Quartz Canyon NUC is Intel's smallest workstation yet, featuring the 45W Xeon E-2286M or i7-9850H. Both Ghost and Quartz feature a PCIe slot for high-end GPUs.
2020-2021: Phantom Canyon is in the VERY early stage of development. TDP is back to 28W with Tiger Lake-U processors. Connectivity is stellar with PCIe Gen4, HDMI 2.1, WiFi6, Bluetooth 5, USB 3.1 Gen2, Thunderbolt 3, and more.
Source: Chiphell via @momomo_us