So some of this might be old news, but in the event it's not:
http://www.hearthpwn.com/news/1215-whispers-of-the-old-gods-expansion-reveal-live
http://www.ign.com/articles/2016/03/11/find-out-when-hearthstones-card-nerfs-will-be-announced
https://www.reddit.com/r/hearthston...dentally_leaked_names_of_17_new_cards_thanks/ (This one is definitely old, but I think we can safely say they're real.)
1.) 10-12 cards are getting nerfed.
2.) Big Game Hunter is very heavily implied to be one of them because they feel it limits design space too much.
3.) They say the nerfs are mostly to the cards that the community most complains about. They pretty much reconfirm that Druid Combo is one of these by not denying the IGN interviewer when he says it's a thing Blizzard feels is a problem.
4.) They talk about how they go about balancing a card and Knife Juggler vs. Warsong Commander as an example. For cards like Warsong Commander, they feel the power is just too game breaking and thus change it, but for something that's less problematic overall (like, say, Knife Juggler), they would keep the ability and instead change the mana cost or the card stats.
5.) They're considering moving previous expansion cards into the basic set in the future, but it probably wouldn't be until the next season (early 2017). There was an implication that these would be cards for very specific types of archetypes instead of power cards like Sludge Belcher that get included in every deck. This is just my speculation, but I could see something like Twilight Guardian becoming a basic card since it basically needs to exist for dragon decks to work.
6.) There's an implication they won't be doing more promo cards like Captain's Parrot since they don't like how it can get confusing for users to figure out which cards they actually need to acquire as new sets rotate in, as well as figuring out what formats they're valid in.
7.) Kibler got confirmation that new dragons are coming in the set. As mentioned earlier, no new Inspire cards or new bolded keywords this time.
8.) Four months ago, there were 14 cards and 3 skins listed in the Japanese credits that hadn't released. Some of them were in League of Explorers. Here's the remaining ones that are presumably in this set.
Cards:
- Khadgar
- Captain Scaleblade
- Chieftan Scarvash
- Dark Iron Weaponsmith
- Dark Summoner
- Sinister Cultist
- Blackrock Summoner
- Bloodaxe Ritualist
- Bloodsail Swashbuckler
Hero Skins:
- Tyrande (presumably Priest)
- Lady Liadrin (presumably Paladin)
- Maiev (presumably Rogue)
