Early WW2 great coated infantry.
If done cleaverly, with separate front bodies (Different button arrangements between nations), ammo punches, heads maybe footwear this set could be used for Danes (!!), Norwegians, Germans, French, Poles, Soviets, Rumanians, Dutch ect.
As heads and rifles would be quite diverse between nations, I guess the release might need to be split into a box of riflemen only, and another box for automatic/squad support weapons.
A lot would be reuseable from one box to the other (Heads, bodies ect.) and maybe it would ‘just’ be a case of having all arms/weapons on seperate sprues, so the basic body/heads sprue could remain the same?
The rifle set could include eg. Mauser 98K, Krag-Jörgensen, Mosin-Nagant, Mannlicher M35 and Lebel rifles.
The automatic/support could include eg. MP38/40, MAS38 and PPD-34/38 SMGs, the Madsen M24, MG34, FM24/29 LMGs and the BAR automatic rifles.
The potential for a dedicated support set is definitely there, as many of the early/minor nations used the same support weapons, such as browning HMGs, Brandt mortars ect. The body sprue would have to include kneeling figures, though.