I could see some sort of variation of hunter that gets turned into a dark ranger, were they just go full archer/BM for hunters, while dark rangers are a cross between a hunter/rogue, they apply poisons and shadow magic to their arrows. They could use stealth, and be an actually mail wearing class, because we literally have 2. Thinking about it, this actually sounds really cool, and something that could fit the game pretty well.
Dark Ranger:
1) Uses poisons, runes, and shadow magic to buff the damage of arrows. Able to shoot blight and poison vials that explode on targets
2) Uses stealth like a rogue, not a camo like hunters, but a true stealth
3) Mail user who uses int for a shadow magic/blight spec, and agi for a poison/bleed spec
4) Would be open for all races, similar to DK, alliance Dark Rangers would be pissed off hunters who got risen by the forsaken, horde
would be individuals are happy hunters who were risen by the forsaken.
5) Could fit the void or WotLK 2 xpac idea, shadow spec fits void, risen by forsaken fits WotLK 2