Hearts of Iron 4 is not a game that should have plushies, I find it strange that there's plushies of the Kaiser and Shah- Platypus plushies because yes it would be even weirder for the WW2 strategy game to be selling plushies of real human figures who lived during that time... The only plushies I think you could actually sell would be of Wojtec, or even the Polar bear admiral of Jan Mayen. I am unsure how many people want to wear Hearts of Iron themed merch as they walk around town- I feel the best kind of Merch for a WW2 Strategy game are Metal keychains (plastic is crap and breaks easily), Plaques, posters or things of that nature featuring HOI4 Loading screen/Title theme art, Perhaps even small Ribbons or plaques of the actual ribbons you can earn in game? After that the only proposal I have is teaming up with Buildcobi.com and convincing them to make a 1:300 Scale model of the Roma, one of Italy's Littorio class battleships because I want them to sell me an intricate model of it damn it! They have American, German, British, and Japanese models but no French or Italian ones! Where's the justice???
Those weird small models of WW2 guns that were at the end of the survey... That would make a cool keychain...