It's definitely an auto include for aggro Hunter, if it becomes seriously viable that is. I don't think this will be enough to put it over the top but it's in a step in the right direction, we will have to see how the list will look after all the cards are revealed to get a proper evaluation.
Other than that it's not worth considering for any other archetype, and Hunter has lots of those. I like the flavor of this card though, I don't care what anybody says SMOrcing with Hunter is so fun and this entices me so much I'm grinning ear to ear.
Aggro can't afford to push the hero button AND NOT play any minions in the early turns. This MIGHT be a mid range card for finishing off other mid range or control decks. You cannot take off 4 turns and expect to win. Hunter has no ability like Quest Druid to fill a board AND heal for full health by skipping the first 4 turns.
As others have said, and where I think this will shine the most is Combo OTK in Wild. This combined with the double damage Mech has alot of potential in Odd Hunter as well.
I do think the new 1 drop that allows you to kill off minions with your hero power might be the way to build the deck. But that sounds more and more like a mid range board deck. Not an aggro face deck.
If you have that 1/3 dwarf that lets your hero power target minions this card is fine. That way you can complete the quest without committing tempo suicide. It's also fine late game when you're floating a bit of mana every turn anyway. There's also other new cards that make it okay to hero power, like the 2 drop that fetches a secret or dragon bane. In a vacuum it's terrible but with the other hero power cards it might be pretty decent.