The page shows that the price of the NUC 12 Extreme (NUC12DCMi9) equipped with the Core i9-12900 processor is $1714/€1401, the price of the version with the Core i7-12700 processor (NUC12DCMi7) is $1514 USD/€1181. In addition to the processor, graphics cards, memory, and SSD will not be provided, but it is not ruled out that there will be fully configured versions. Compared to the current price of the NUC 11 Extreme on SimplyNUC, the new model is about $300/€220 more expensive.
The NUC 12 Extreme has two SO-DIMM slots, supports 64GB of DDR4-3200 memory, and can be configured with up to three M.2 SSDs (PCIe 4.0 x4 lanes), equipped with a customizable LED front panel and cooling system, it supports Wi-Fi 6E, Thunderbolt 4, 10Gbe LAN, USB 3.2 Gen2, etc. It is equipped with a DisplayPort 1.4 interface and an HDMI 1.4 interface.
Previously, Intel said that the NUC 12 Extreme would be available in the first quarter of 2022, and being on the SimplyNUC page seems to indicate that the actual release is not far away.