The most logical thing to do in my eyes:
Update the current 'Canis lupus' (entire grey wolf species) and make it the subspecies 'Canis lupus occidentalis' aka the northwestern wolf / Mackenzie valley wolf / timber wolf. Add 'Canis lupus lupus' aka the Eurasian or common wolf. Both subspecies get (lots of) additional coat variants. The northwestern wolf gets lighter and darker (black and smoky) variants, and the Eurasian wolf gets darker and richer pigmented and beige variants.
Canis lupus occidentalis:
Canis lupus lupus:
The game will now have 3 wolf subspecies (arctic, northwestern, Eurasian). Instead of 1 entire species and 1 subspecies of a species that is in game already, which makes no sense at all.