That seems strange, my guess is that maybe they got the naming wrong and it is the M1X(or whatever). They will have to have a way of differentiating the M# and M#(Pro) devices. Maybe it is the M2 and they will be updating the M# every year now, but I still think that there will be an M1X.Are they gonna skip M1X altogether? With this news it seems like that. It can be result of silicon shortages and decision to wait a bit and go forward with M2 right away. Let see at WWDC.
But they would leak a lot about A15 this way I guess on other side.