I think Strelets could make about any set, any period and with the new sculpting and having mini-sets, it would turn out a bestseller. I wouldn't even mind getting a German WW2 hospital spread out over 4 different sets:
3 minisets - nurses, wounded and combat medics.
I would probably buy just one box of combat medics, but several boxes of nurses and wounded. The nurses could be useful for about any war since the early middle ages, as their attire hasn't really changed much. They could do double duty as nuns - imagine a Viking raid, duty in colonial Peking or Africa, WW1, AWI, Napoleonic wars etc.
That all could be followed by a Big Box set that includes some skillful surgeons, an operating room, amputees, POW, civilians, a horse sled. The box cover could feature a cut-out picture of the 'Stalingrad Madonna', which was painted by a physician in Stalingrad:
Well, there are even gaps in the 'ordinary ww2 sets'. What about soviet scouts in camo overalls? what about german, soviet and us mountain units? (the us 10th mountain division had quite some unique pieces of equipment) anyone ever saw a 1/72 set of luftwaffe feldivision or Balkan partisans?