Most of the units for "Heroes," in all parts, are taken from our earthly mythology!
I also think that imps will be included. In "Heroes 5," they turned out to be a fun, mischievous unit. I would really like them to be in "Heroes 6" as well :). But still, the first candidate for implementation is the devil. Even with Juggernauts, he simply must be there.
As for whether demonesses should be ranged or not, we'll see, anything is possible :)! Personally, I like both options :).
Цикл "Закадычные враги": "Особенное гостеприимство, "Супероружие", "Меж молотом и наковальней"
"Падение Шантири"
Кампания для "Кодекса Войны"
"Выбор Сагиттеля"