Some quite interisting & well-considered comments on this very exciting topic so far. :+1:
For my areas of interest, the following suggestions seem the most promising & logical imho.

Antiquity & Early Middle Ages
- Byzantine Empire & Enemies (from 330 until 1453 AD)
Kabinettskriege
- 7YW, Russian & French subjects in particular but also Prussian artillery
Napoleonic Wars
- Russian, Austrian, Prussian & "secondary" nations infantry ranges (marching, advancing & firing lines)
- Austrian & Prussian artillery in particular
Age of Imperialism
- French Imperialism (2nd Intervention in Mexico, Tonkin Campaign & Sino-French War, Boxer Rebellion ...)
early Industrial Warfare
- Franco-Prussian War, French & Prussian/German artillery in particular
- Russo-Japanese War, both sides infantry & artillery (suitable for WWI as well)
WWI
- early Austrian infantry, MG & light/medium artillery crews vs. early Serbian infantry & artillery crews (the latter suitable for Balkan Wars as well)
- Bulgarian early infantry, MG & light artillery crews (usable for Balkan Wars as well)
- French Spahis & Tirailleurs (usable for many other conflicts as well)
WWII
- 1940 Dutch infantry & support weapons and French infantry support weapons, AT- & light artillery crews
- Chinese infantry & support weapons in summer & winter gear (different factions & uniforms)
- Romanian & Hungarian infantry, support weapons & cavalry 1941-45 (summer/winter)
- Afrika Korps support weapons, light/medium arillery & AA-/AT-gun crews
further 20th century conflicts
- Spanish Civil War infantry, support weapons & light artillery crews for both sides
Generally
- Mule trains appropriate for a good number of different conflicts
... :sweat_smile:

Hope the readers can forgive me, but expanding the topic into another wish list was an irresistible impulse I couldn't resist entirely (tried very hard to minimise it as much as possible though). :wink:

Of course, Strelets should also enlarge their Imperial Rome, WWS & ACW ranges as well as various other WWI/RCW & WWII theatres. :+1: :smile:

Classic Peter! I can't imagine what is on your long list... haha!

We all need another painting à la Dorian Grey, I suspect!

I suspect that there is almost no market for it (probably just me) but I would really like to see Mahrattas and sepoys for Wellingtons campaigns in India - very colourful!

No, you're not alone there Phil. I think British Colonial India era range would be great along with a Sepoy Mutiny/Rebellion line (which Britsfan mentioned too).... And I'm still hoping for a dedicated North West Frontier line to be developed also - I had thought Mr. Strelets was asking about this topic several months back for this reason...and between you and me, I thought WSS wouldn't sell but I was very wrong about that.