Most of the units for "Heroes," in all its installments, are taken from our earthly mythology!
I also think that imps will be included. In "part 5," they turned out to be a fun, mischievous unit. I would really like them to be included in "part 6" as well :). But still, the first contender for implementation is the devil. Even with Juggernauts, he simply must be included.
I liked the imps the most in part 4; they looked both evil and funny at the same time, and they had a trident. In part 5, they made them funny and cool (I just didn't like the devils, or whatever those fiery demons were called). Well, information appeared in the Heroes Community from a closed forum, where they announced that the champions of Inferno would be Archdemons; most likely, these are just the same devils, but, as in the case with angels, they decided to change the name.
Демократия есть одурачивание народа при помощи народа ради блага народа.(Уайльд Оскар)