Leaked photos from an MSI meeting confirm that AMD is indeed preparing Extreme variants of the X670 and B650 chipsets.
The footage was published by Twitter user @wxnod, who recently shared a prototype AMD Ryzen 7000 CPUs. The new photos show a presentation in an MSI office, presumably by or with AMD experts.
Apparently AMD is currently working on four different chipsets for the Ryzen 7000 platform. This includes the aforementioned X670 and B650 models, but also the previously mysterious Extreme variants (X670E and B650E) of that pair.
The differences between them seem quite clear. Where the regular chipsets come with a PCIe 5.0 slot or a PCIe 5.0 M.2 slot, the Extreme motherboards do both. Both a PCIe 5.0 graphics card and a new PCIe 5.0 SSD can use the new interface simultaneously.