According to new rumours, Apple continues to develop a true next-generation Mac mini, rather than building on the Mac Studio. Supposedly, Apple will release the Mac mini with an Apple M2 SoC, along with the powerful Apple M2 Pro. Both versions should ship with a redesigned chassis too.
https://www.notebookcheck.net/Apple-to-offer-a-next-generation-Mac-mini-with-Apple-M2-and-M2-Pro-SoCs.607551.0.html