We are excited to release a preview of the cards being released this thursday! Click here to see some of the cards:
http://imgur.com/a/hhHXF

DRAG is a new ability that pulls a target forward after attacking - the opposite of knockback.
COMBO is an ability that activates after attacking.
DRAMATIC ENTRANCE means the minion is played to the center of the map.

We also have PATCH NOTES for upcoming balance and mechanics improvements:

GENERAL
The global moratorium on direct castle damage has been lifted! We feel this restriction is no longer necessary and can make for clearer, more interesting damage cards based on this distinction. Several cards have been rebalanced around this change, and all random target mechanics now have a chance to hit the castle.
CHAOTIC STORM - Cost increased to 2.
INFERNAL FURNACE - No longer deals damage every turn. Cost reduced to 2.
ICEWEAVING - Damage increased to 2.
FLAME - Cost increased to 2, can now hit castles.
SUNBURST - Can now hit castles.
SACRIFICE - Cost reduced to zero, damage reduced to 2.
DRAGON BOLT - Cost increased to 3, can now hit castles.
FLAMES OF ETERNITY - Cost increased to 4, can now hit castles.
SWIFT JUSTICE - Can now target the castle.

Enchant targeting rules have been more streamlined for balance and gameplay purposes. Most enchants now only apply to MELEE COMBAT MINIONS. The following cards have had their targeting restricted to melee combat minions:
SWIFTNESS
BLINDING RADIANCE
FLAME SHIELD
FACE OF THE DRAGON
MEDITATION
SHROUD OF THE REDCLOAKS
TREASURE HUNT
DRAGON CREST SHIELD
RAMPAGE

BASIC CARD IMPROVEMENTS
BLAZING SWORDS - Changed to "3g: Give your combat minions +2 attack this turn."
MASTER THIEF - Ability changed to INVEST (1), which grants gold on your next turn.
PLUNDER - Changed to "Deal 2 damage and INVEST (1)"
LIGHTNING BOLT - Changed to "3g: Deal 3 damage."
KNOCKOUT - Cost reduced to 2, and price penalty for enemy removed.
FILTHY PEASANT - Changed back to a basic 2/3 unit.
GENERAL BALANCE CHANGES
LUMINARUS - Cost increased to 6.
KING KAIJU - Cost increased to 8.
TITAN WATCHER - Stats reduced to 6/5.
SALAHAR SPITEFISH - Cost increased to 2.
CRUMBLING ARCHIVE - HP reduced to 2.
PACIFISM - HP reduced to 4.
SHATTERING STRIKE - Cost increased to 1.
RALLY THE TOWN - Now 5g and summons three peasants.
STABLES - HP reduced to 2.
DRAGON TEMPLE - Cost reduced to 2, HP reduced to 2, HP bonus reduced to 1.

And finally, we will be releasing a new, limited time smaller preorder bundle later today!