As many know Russia covers a huge amount of land and with this a large variety of habitats and species. I believe this would lend itself well to the potential for a second Russian map! To avoid being a clone of Medved it would be preferable if this map was more focused on the mountains of Russia offering both a new environment and new species opportunities!
Returning species: really any Medved animal could comfortably fit on this map although it would be smart to leave a few as Medved exclusives such as the reindeer and musk deer. Additionally existing species could be modified slightly and represent sub-species spread across Russia like the 5 sub-species of brown bear and 4 sub-species of moose found in Russia. Species such as Chamois, Red Deer and European Bison could also fit well in this map.
New species: A map like this has opportunities for a huge variety of exciting new species such as
Asiatic Black Bear (Class 7)
Maral (elk subspecies) (Class 8)
Izubr (elk subspecies) (Class 8)
Siberian Roe Deer (Class 4)
Altai Ibex (Class 4)
Gobi Ibex (Class 4)
Caucasian Tur (Class 4)
Marco Polo Sheep ( Class 6)
Snow Sheep (Class 4)
Great ones: Every new map seems to need a new great one to come with it now so for this map the Wild Boar would be a obvious choice. However, if they are included in this map Russia does have a sizeable population of European Bison (far more then in Germany) so a great one Euro Bison is not out of the question. Hunting a huge bison through the thick Russian snow would instantly make this map one to remember.