Hearthpwn

Do I have to pick only one?

Webspinner, Sabotage, Foe Reaper 4000, Loatheb and Kel'Thuzad

As a control shaman player Neptulon. Underrated him for faaar too long and now i lose shamans possibly best carddraw and card advantage machine =(

Voidcaller. And obviously, I'm gonna miss Mal'Ganis a lot too.

Zombie Chow.

All mechs, pretty much

Paladin: Shielded Minibot (I cry about this about once a day)

Priest: Vol'jin (So satisfying to use him on Ysera or any of the giants

Hunter: Webspinner

Neutral: Loatheb

Nobidy said Tinker's Sharpsword Oil yet? I will definitely miss that one. Also, Sabotage is a funny, little card. The Big Mech Legendaries Sneed's Old Shredder, Foe Reaper 4000 & Mekgineer Thermaplugg will be a loss and Malorne , Loatheb, Trade Prince Gallywix &  Vol'jin as well.

Since I'm sure they'll introduce new anti-aggro cards, I'll be missing the unique cards most.

Recombobulator and Hobgoblin, I will see you often in Wild mode!

Loatheb and Vol'jin. These cards belong in the Classic set. 

Trogzor the earthinator would be used in the beggining as THE new 7 drop and it might somewhat see some play but unfortunatly that's GVG as well. It was a cool card though

I will miss Glaivezooka Mad Scientist and Haunted Creeper the most but i'm actuallly glad with standard because some cards i hate will go as well like Sludge Belcher and Deathlord i think nobody liked those cards cause only cancer like mid-range and priest play those cards and thank god Antique Healbot will be gone cause we all know thhat shit's cheating.

Quote from DutchDuckGuy777 >>

I will miss Glaivezooka Mad Scientist and Haunted Creeper the most but i'm actuallly glad with standard because some cards i hate will go as well like Sludge Belcher and Deathlord i think nobody liked those cards cause only cancer like mid-range and priest play those cards and thank god Antique Healbot will be gone cause we all know thhat shit's cheating.

Mad Scientist. Goodbye my dear friend, you did show us all.

Quote from BoobTheNoob >>

I am gonna play wild a lot so I'm not gonna miss too much :P 

Spoken like a hearthstone pro