Overall I believe that there are quite some opportunities for Avatars of War to sell human miniatures to the Fantasy collectors. There are definitely people who would buy both 13th century knights on foot in chainmail, tabards and barrel-helmets, and 15th century in full gothic-style armour with feathers and plate armour.
Outside the knight territory, landsknecht heroes will always find buyers amongst the Empire collectors. There are also a market for human pirates! And female characters (but they don't need to show so much of themselves as the Dark Elven ladies tend to do), and not least of all wizards. There is
a gap concerning humans in Fantasy wargaming, or at least weak competitors. Foot knights are at least an open goal for whoever wants some purchases.
Now, AoW should get that Dwarf army going and continue their Apocalypse releases, but behind that corner they should consider some human sculpting. A halfling or two wouldn't be poor, either.
Chances are that AoW will sweep the market out of sheer quality.