Another scenario I can see happening is, Apple might be waiting until the transition from Intel to Apple Silicon has been completed to come out with the M2-series chips. Until that happens, which will probably be next year, I could see them coming out with an M1 Pro-enabled Mac Mini that visually resembles the existing Space Gray Intel Mini, with the same amount of ports. The way it'd work, the M1 base-line and M1 Pro being used for the Mac Mini, and the M1 Max and M1 Ultra for the Mac Studio.