I was interested in the history of PENTAX DSLR. So, I made a genealogy diagram.
There are two viewpoint, one on the series, the other on the spec.

FAN MADE PENTAX DSLR GENEALOGY: SERIES

FAN MADE PENTAX DSLR GENEALOGY: SPEC
The series viewpoint, I also explained the series of film cameras that became the motif of the series.
ex) The motifs of K2000, Km, Kx, Kr are K1000, KM, KX, K2.
I think the name K2000 has two meanings, Kdigital's second generation series and K1000 a motif.
Also, Kr would have changed the number "2" to "r”.
The series spec viewpoint, I organized it according to the following rules.
 The base color represents the generations of the imaging engine.
ex) K10D, K20D, K200D, Km are the same generation of PRIME.
 Arrows represent genealogies, annotations represent improvement points.
ex) Successor of Km is Kx, changes to Sony sensor and order color
 The lower left number represents the firmware number.
It is a unique number given for each firmware of each model.

If my idea is correct, it will be as follows.
 The countdown started from K7 ended with K1.
 Genealogies starting from K01 (MZ series motif) also ended with K70.
Therefore, I have no idea what the naming convention of the future Pentax camera will be.
However, by making these genealogy diagram,
I was able to establish some predictions about what will happen in the future.
 There may be 645 successive models next year or the next year.
 The successor of KP may eventually become the successor of K3ii.
※ If S1, S2, SP is a motif, KPII based on SPII may be released.
 Variable angle machine which cut out function from K70 may become an entry model.
※ However, it may be good to continue selling KS2 for a while.

In the future, I would like to increase the these degree of completion.
I'm happy if you can comment on this thread.
 Do you know the firmware number of the following models?
KP, K50P, K30P, 645D, KXW, K7W, K7IR, K200DW, K20DW, K100 Super
 Do you know the version of Milbaut that will be the basis of PRIME MII and PRIME IV?
Best Regards.