Well its funny that right now, the weapon you get has a 2 out of 3 chance to synergize with one of the other cards. 3 cards for 3 mana is good, we'll have to see the general quality of the cards you'll get.
In Arena, this is a 5 star card without fail. You can top deck this card and be very very happy.
In Standard, this is really good value and will be in all decks that are not aggro or mech based. Mech and Beast decks already have card draw, this appears to be for a late game Hunter deck. Combined with the other cards spoiled, it does appear a late game Control Hunter (edit) is being pushed.
In Wild, this gets slightly worse. There are too many random beasts and the weapon variety is too random to be consistent. Same as secrets. So this is far worse in a larger card pool.