Here is the new board:

One of the new cards available:

"The Battlecry of five mana cost Rogue card Dark Iron Skulker, for example, backstabs every enemy minion on the board. The Blackwing Technician is buffed if you have a dragon in your hand. Blizzard expects players will construct Dragon and Dwarf-themed decks upon the expansion's release."

I'm curious to know how exactly players will be able to construct dragon and dwarf themed decks with only 31 new cards coming out...

Anyway, I'm really excited!!

Rend Blackhand (Legendary)
7 Mana (8/4)
Effect - Battecry: If you're holding a Dragon, destroy a Legendary Minion.

-Dark Iron Skulker (Rogue Rare)
5 Mana (4/3)
Effect - Battlecry: Deal 2 damage to all undamaged enemy minions.

-Grim Patron (Rare)
5 Mana (3/3)
Effect - Whenever this minion survives damage, summon another Grim Patron.

-Hungry Dragon (Common - Dragon)
4 Mana (5/6)
Effect - Summon a random 1-cost minion for your opponent.

-Blackwing Technician (Common)
3 Mana (2/4)
Effect - If you're holding a Dragon, gain +1/+1

Finally, that Rend Blackhand sucks.

Yeah he's pretty fierce.

More worried about that Hungry Dragon. 4 mana 5/6? jesus

4 mana 5/6 is awesome.

Will purchase as soon as available.

There's an exclusive card back for pre-order. Of course, for a game like this I would pre-order regardless.

Nice, haven't booted Hearthstone in a while, hopefully haven't missed a card back!

Best 1-mana minions that will be auto summoned (no battlecry) are:
Argent squire
Cogmaster
Leper Gnome
Lightwarden
Young Priestess

Hunter:
Webspinner
Timberwolf

Mage
Mana wyrm

Priest:
Northshire Cleric
Shadowbomber

Shaman:
Dust Devl (easily the best card here)

Warlock:
Flame Imp (also top tier)
Blood Imp (also very very good)
Void Caller

Warrior:
Warbot

man, that 4 drop is going to hurt. Much much better than the current fave, Yeti

I don't care about cardbacks at all, I just don't want the inevitable purchase server crash at launch.

Isn't it a random 1 drop? So any class can get anything?

Yes it's a random drop those are all the possibilities

Well all the good possibilities. The other ones mostly are super weak with decent battlecries. However an auto summon denies battlecry