The new expansion laucnhes in August and adds 132 new cards & new keyword, "Inspire".
When the Lich King and his undead Scourge threatened the world, the Argent Crusade called upon Azeroth’s mightiest heroes to prove their mettle in a magnificent tournament. Knights of all races flocked to Northrend, vying for glory in epic battles against fearsome monsters. Though the Lich King’s evil has been vanquished, the Grand Tournament continues… the competitive atmosphere’s just a bit more playful than it used to be.
The expansion adds a few new features along with cards we expect to see from previous expansions like Goblins & Gnomes. A new card action called "Inspire" will be added to some new cards which is triggered by the use of your hero power.
Minions with the inspire keyword possess a special ability that may only be activated by using your Hero Power. Deploy them in force to gain tremendous value, or drop them at just the right time to give your play the perfect boost. Can you really inspire an ogre? Absolutely! It just takes finesse (or a ham).
Knights are the name of the game, with various cards being added including Pirates, Murlocs, Ogres & Dragons. Only a few cards have been announced so far with more being voted for over at the official site
There is also a pre-order bonus option for the new packs:
We’re celebrating The Grand Tournament with an exciting bundle pack offer! Starting next week, players will be able to pre-purchase a bundle of 50 Grand Tournament card packs for $49.99 (UK Price TBC). In addition to 50 Grand Tournament card packs ready to bust open upon launch, the bundle also includes a triumphant new card back!
Card packs from this pre-purchase bundle will be kept sealed until The Grand Tournament officially releases—no peeking! This special offer is only available as a one-time purchase and ends upon the release of The Grand Tournament.
We'll give you more information as soon as we have it!