So I figured I'd post this deck as the wild meta is mostly defined by control decks, and this deck usually catches my opponent's unawares. It often plays out like an aggressive or mid-range deck, and by the time Emperor Thaurissan drops, they usually don't have tools to change the outcome of the game. This deck also competes with some aggressive decks as it has a lot of cheap minions, removal spells, and lifesteal.
I'm currently sitting at a 75% winrate (9-3). This deck will struggle against hyper-aggressive decks (*cough* other Demon Hunters *cough*) and control warrior because it stacks armour.
With double Clockwork Automaton, your Metamorphosis Hero Power will deal *20* damage! Use it twice and it's 40 damage (often) in one turn! It's important to note that with the Thaurissan discounts, the combo is 11 mana. Most of the time, my opponent has been low enough for me to finish them off with a single blast and some minion damage on-board. However, if you're able to, holding the coin can work. Additionally, with x2 Skull of Gul'dan you're fairly likely to hit either a combo piece, OR a low-mana card that allows you to deal some extra damage such as Chaos Strike or Aldrachi Warblades.
Metamorphosis can be prepped whenever, however the timing is important. You need to be able to attack things with your normal Hero Power until you can safely wait a turn or two to unleash the combo.
This deck isn't amazing, and there's probably a better version out there, but it's been pretty consistent and it's a unique combo that I haven't seen anywhere else.