The air superiority tables are code used to determine the number of flights offered given nation A fights nation B, depending on year, and so on and so forth.
Just like the counter-battery effectiveness tables, and the leader ratings tables, these are hard-coded items buried deep in the code itself. They are not data-driven, like the AI pick lists. There is therefore no way for an end user to play with these for imaginary projects. Same goes for the flag changes - if it is time for one of the 14 or so new flags for the Afghans, it changes to use that flag. These flags are of course not in the 0..N sequence in the various SHP files. Same goes for the battle locations between army A and B - the Danish OOB even if you play about with it, will use Denmark-specific locations, the Swiss Swiss, depending on who is paired up against. (And I cannot think of any sane way to do battle locations between any opponents other than in specific code, so no way ever to have those in a data table - spaghetti code is the only option).
So, if you want to have "imperial Germans" or Ruritanians or whatever - you can hack about, but they will in reality be whatever OOB you based them upon. So don't be surprised if you get a battle set in say, The Andes

.
Third party end-user projects are hackery, and so unsupported by ourselves. As with any hacking project (and sp2ww2 started as that, with code changes poked into the Sp2 exe) - you are entirely on your own. We are not interested in Alternative history, Draka universe fiction, Sci-fi or whatever. Feel free to post such things here, if you want to, and if you are prepared to support them. We won't.
Game support is limited to
actual armies supported by the OOBS we supply, and any reasonable small "what-ifs" with these (and determining such stuff even a year or 2 in the future, like the UK FRES systems, its a Boxer - oh no it isn't, oh yes it is (this week) - is quite bad enough, thank you

).
The data mod tools like Mobhack are provided for that purpose, only. Any other usage is at your own risk.
Cheers
Andy