This post, elsewhere on this forum, links to another reboot; a magazine with a cover story about the new Commodore acquisition.
That article confirms that it is indeed an Ultimate64 motherboard and a Retro Fuzion case, and the keyboard is “new [keyboard] by Jim Drew”. (Jim designed the Mechboard64 linked above.) The article also goes on to claim that it’s not just existing components bolted together, but a unified design with “unique twists”.
The article is worth a read, if you’re interested in this project.