There have been whole loooong threads of suggested new hero powers and none (that I have seen) are distinctive AND balanced. Things like summon a 1/1 minion with charge that dies - basically a bad mage power.
A hero power that's just a bad version of another hero's hero power is...bad.
I had an idea of a DK hero power being something like "Draw a Rune Card." You would get one of three random Rune Cards in your hand: Frost, Blood, or Unholy. The Rune Cards themselves wouldn't cost Mana(maybe cost 1 Mana I don't know), but it would cost 2 to draw one(so similar to all other hero powers). I'm not sure what the Rune Cards would do exactly, but nothing too powerful. It would basically be like Shaman's hero power but instead of randomly generated weak minions you'd get randomly generated weak cards.
What is needed is a bit subjective though isn't it? For DK's specifically, something like "Bone Shield" a la Blood DK that gave a minion a divine shield type buff, if you wanted to make it more wow-related it could have "charges" and a cooldown, ie put a shield on target that eats 2-3 hits but takes 2-3 turns to reactivate. Or something like deathstrike that does damage + heals (since they're adding lifesteal) or even gives a minion lifesteal (like dinomancy kind of but instead give a minion +2 lifesteal). Then again, I'm not a designer so balance wise, no idea how viable those ideas are. They seem ok to me, but who knows, could be wildly overpowered.
Hearthpwn has started to post all the card reveals.
http://www.hearthpwn.com/guides/2963...thstones-sixth
Their list is by far nicer than anything I could make.
"El Psy Kongroo!" Hearthstone Moderator
They released some shitty cards at the start but the latest ones seem to be quite solid, especially the mage cards. Sindragosa seems to be the new Dr. 8. Lana'thel seems underwhelming but she's the only warlock card revealed so far, if they want to push discard lock to be a thing then they need to make discards more reliable and not to RNG'ish. I like that the new warrior cards are going to give them a lot of armor.
Yeah at first it was looking like another The Grand Tournament like expansion which was complete garbage. But some of the more recent reveals are quite good. I really like the new 2 mana Warrior spell and the 3 mana 3/4 Mage minion that draws a card if an enemy is frozen will be awesome in Freeze Mage.
Hopefully we see the Death Knight Hero cards soon, those are the big daddies of this expac.
Bearshark might be the best card of the expansion
Absolutely amazing Hunter card
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Lana'thel looks terrible. They need to stop making the discard mechanic a thing
Bearshark looks good, so does Corpsetaker. Freeze Shaman should be interesting
I am glad that Dave Kosak is not working on WoW anymore. Screw that guy.
"El Psy Kongroo!" Hearthstone Moderator
I like the idea of Defile especially with Street Trickster or even Possessed Villager.