Why not consider a race composed of heroes from East Slavic fairy tales?

I don't want to sound sarcastic, but why bother with races from different parts of the world?
We have a vast, untapped resource – Russian folk tales. What's wrong with that? They included Gorynych in Wog, so why not the rest…? Here's an idea:

Level 1 - Ivan the Fool, evolves into Ivan Tsarevich (something like a Berserker from the 4th game, with the main bonus being that he surprises enemies with his unexpected actions).
Level 2 - The Grey Wolf, evolves into Akella (although this is no longer strictly a Russian folk tale, it still fits), and includes all the bonuses of the tigers from the 4th game.
Level 3 - Solovei the Robber (attacks nearby units with a whistle, is deaf himself, so he has immunity to curses and similar effects…).
Level 4 - Baba Yaga (all abilities are roughly the same as the Succubi from Disciples), Baba Yaga evolves into the Old Woman Izerygil.
Level 5 - Leshy (casts a random spell, such as a curse or slow), he evolves into Koschei, whose upgrade will be very expensive, as we'll give him a lot of different abilities.
Level 6 - How about Dread Muromza, turned into a dark necromancer from the far-off kingdom…? and so on.
Level 7 - Well, there's really no question here – it has to be Gorynych, but we need to figure out what he'll evolve into! ;) ;) ;) ;) ;) ;)