Hi Tom,
I like the idea of WW2G (WW II Galaxy) being somehow co-existent with the OTU Third Imperium Setting and Tech, but somewhat isolated from the mainstream of the OTU. For me though the most important element is to use the "look" of WWII equipment and uniforms but in a space setting. Overall technology and political dynamics should somehow mirror actual Earth history - but explaining how it came to be would be a bit of a headache. For now, I'd like to say that the region was populated by Solomani migrants who came to the WW2G sectors ages ago, but for various reasons looked to 1940s Earth for political and aesthetic inspiration, and thus the rebirth of a German Reich, Imperial Japan, etc. One thing though that I'd like to incorporate is the Alternative WWII Mecha you find in such settings as Dust, AE-WWII, Gear Krieg, etc, and the air/spacecraft of Uchuu Senkai Yamato, Luftwaffe 1946, Tigers of Terra, Crimson Skies, Rocketship Empires and Hard Vacuum. But the tech would be spacefaring, TL 12 and above ...
Oh, and Garbage too
https://www.youtube.com/watch?v=raRGnueg8Lo
I'd like to also put in some additions - like the idea of a German Civil War, say a Reich split into 3 factions - (a) SS-led Nazis, (b) "Honourables" led by the Wehrmacht, and (c) a German Communist DDR-type group.
Cheers,
Gary