M4s? Mini-M4?
They might get rid of the A series and call everything M.
This is for the entry level Macs, has nothing to do with the A series. The M is what the A14X and its successors would have been, never made sense to unify them and the people wanting an M in an iPhone will never get it, both brands are well established too.
The entry Mac M4 appears to be 4 performance and 4 efficiency cores, where the entry iPad Pro had 3 P and 6 E cores, which makes sense since the iPad is the more power limited