New heroes have finally been confirmed as additional playable options in Hearthstone's portfolio. Magni Bronzebeard was announced earlier today via a YouTube video from Blizzard as the latest playable character.
Magni Bronzebeard is an additional entry into the Warrior archetype class. A news post on Blizzard's website further detailed exactly how these new characters would work in tandem with the existing playable classes. The below quote offers most of the detail required.
"Aside from the vibrant new Hero portrait artwork, these new Heroes also come with unique Hero power animations. Magni’s version of the Warrior’s “Armor Up!” Hero Power is sure to reinforce the fact that his majesty is not to be trifled with!
New Heroes also come with unique emotes and voices that convey their individual personalities, a play area featuring a custom visual theme, and nifty “entering the game” animations so you can greet (or intimidate) your next opponent in style.
If that wasn’t enough, new Heroes also come with a unique card back that will impress even the mightiest of dwarven kings! The steadfast “Magni” card back is added to your collection immediately after purchasing the Magni Bronzebeard Hero, and can be used with any deck of your choice."
These new characters will be priced at $9.99 apiece. More information on release dates and so on are expected to be unveiled in the near future.