Eleven new cards have been revealed today with the promise that more cards will be revealed in the coming days. There are a number of interesting taunts such as Tar Creeper. However, some of the cards seem to be the usual. Blizzard is trying to push mage towards secrets and hunter towards control. There's a card to make sure that the dominating archetype from last season will stay down after the nerf. And there are a couple fun cards that don't look like they will appear outside of "fun" decks.
All in all, we have seen only about 15/350 cards so we can't say what the meta will look like. But it appears promising.
Things of note
- Quest cards can be counterspelled.
- Nether Portal does indeed spawn 2 imps every turn! And the portal itself takes a minion slot on the board but it can't be destroyed once activated.
- Un'Goro Pack via Elise the Trailblazer doesn't mimic in-game packs. It has better chances for Legendaries and gives a guaranteed epic. I believe the Senior Designer Pete Whalen said that you were very likely to get at least 1 legendary per time you use the card.