Gnomeferatu makes Warlock milling possible for the first time in the game's history. Wisely, all the complimentary tools are in wild.
The plan is fairly direct - play minions that pull cards from the opponent's deck (Dancing Swords, Deathlord, Coldlight Oracle), forcing them to commit to the board, and then punish with the numerous AOE's.
I have considered Dirty Rat as well, but that creates negative synergy for the brutal Brann Bronzebeard/Coldlight Oracle turns we are all so familiar with in Rogue. And while Demonwrath is a great card for this archetype, Hellfire is better against all the 3-health minions in Token Druid and Pirate Warrior which won't be going anywhere soon. More healing would be nice, but until we get a good Lifesteal card for Warlock (more reveals on the way), double Antique Healbot (available with Brann Bronzebeard) will have to suffice.
Can't wait to try this out.
Aug. 1 update - Who would've guessed that a theorycrafted Warlock mill deck would reach the front page of all decks! Thanks to everyone who's upvoted, and I promise a write-up after I give this thing a spin for a few days after the expansion. Way cool.
Aug. 3 update - Both Treachery and Skulking Geist have now been revealed. I never anticipated this type of attention, so I am hesitant to make piecemeal changes to the list until all cards are known. As I noted in the comments, I actually don't think Treachery works in this type of build, but Skulking Geist seems like a natural fit at first blush. I will take my best stab at refining the list after the final card dump and post my results after the first day of release. Thoughts on new cards fitting (or not) into this deck are appreciated - for example someone recommended Sir Finley Mrrgglton, and the more I think about it the more I think he's practically necessary. Thanks again for all the support.
Aug. 8 update - The final reveal didn't bring anything I found too useful for this deck. There is zero demon synergy for Bloodreaver Gul'dan despite the amazing hero power. Sir Finley Mrrgglton still seems better. And in light of Skulking Geist, Power Overwhelming no longer makes sense. I dropped a single copy of Shadowflame to make room; it loses serious synergy in PO, and I still like double Twisting Nether to fit this deck's plan of forcing the opponent to commit to the board.
Also, The Lich King doesn't help that plan - it actually risks self-milling by adding cards. But because every other non-aggro deck will be running it from here to forever, the hilarious Army of the Dead and Doom Pact will either cause meme-worthy moments or create utterly dead cards for the opponent. I'm looking forward to that.
I'm going to stick with this list going into the release. As I've mentioned in the comments several times now, I believe Treachery/Fel Reaver shenanigans belong in a completely different deck without Dancing Swords and the like. Someone else can do a better job of figuring that one out.
I'll report back on my results Friday or Saturday depending on how busy work is. Have fun!