Just posted they´ll annouce 3 players today.
Either Koldamenta, Mixwell or both will be there, i´m sure.
The Hog Rider card is unlocked from the Spell Valley (Arena 5). He is a very fast building-targeting, melee troop with moderately high hitpoints and damage. He appears just like his Clash of Clans counterpart; a man with brown eyebrows, a beard, a mohawk, and a golden body piercing in his left ear who is riding a hog. A Hog Rider card costs 4 Elixir to deploy.