Future expansions.

But don't you think it's silly to make a faction icon with a dragon (which isn't in the faction's combat ranks)?

Honestly? No, I don't. The Dark Elves are known for their fanatical devotion to Malassa, so they certainly wouldn't mind having the Dark Dragon or its servants on their emblem.

Then it would be nonsense. And it wouldn't be in the spirit of Heroes 6 (not Heroes in general, but specifically the sixth installment). And how do you imagine it? First expansion: Railag is defeated by demons in the Dungeon and imprisoned in Shi'o. Second expansion: Railag comes out to fight the Angels. Is that how it should be?

Well, maybe I don't know something about the lore, but it seemed to me that Railag became a demon of his own free will. So I don't think there's anything wrong with following the "Star Wars" scheme: first tell the story of the period when Darth Railag was evil, and then move on to his good old past.

It will make them jealous. Compare the Dark Dragon to any champion in any faction (in terms of the number of cells). If they introduce a dragon, it will be some kind of dwarf. A regular dragon won't be able to shrink as much as Kirins do.

Well, maybe. Although, perhaps they will put the dragons on their hind legs, as in Heroes 3? In principle, there is nothing stopping them from tucking their tail under themselves, as in the fifth installment.