That's not what the number designation means. They will release M1X and M1Z and whatever other letter designations necessary to introduce variations on the M1 architecture.Mr. Cook stated Apple would take about two years to fully transition their lineup. I feel that would mean a higher end M2 for this year is inevitable.
I love the incentive for the personal computer market right now. Let's get it on, can't wait!
Hopefully this also leads to a (partial) recovery for the somewhat lost art that is great Mac software.
We won't see M2 until Apple is ready with a new architecture that is a successor to M1. If I had to guess the first Mac with an M2 will be the last Mac update to Apple Silicon, the Mac Pro.