It’s good you asked, Amon, others are probably wondering too.
There’s one league.
Four standings sheets - OOB 2nd edition, BM, P2V, and overall/composite.
8 games needed in BM to play in BM playoff
?? games needed in OOB to play in OOB playoff
?? games needed in P2V to play in P2V playoff
Number of games required for OOB and P2V will be determined around mid-year (like July) because then we will all know how much activity/interest there is in each of those. That leaves plenty of time for players to get the # of games they need to qualify if they want to play in those playoffs (about half a year)
Composite/overall standings is for everyone’s information, to help you size up your opponents and see where you stand overall. Standings within each version of 1940 A&A govern playoffs by version. Does that answer all questions? If not, please ask follow-up questions. I will update the official league rules someday, but this is the most hectic time of year for me.