Hearthpwn

It's just a list of noticable cards which rotate out with next expanison with a short comments about popular archetypes. I don't speculate about future meta, because we know almost nothing about new cards. 

DRUID

Fandral Staghelm, Mire Keeper, Feral Rage

Kun the Forgotten King, Mark of the Lotus, Jade Idol

Enchanted Raven

The most meaningful is loss of Jade Idol and all jade related cards which completely eliminate this archetype from standard (Thank God, finally). Kun the Forgotten King is used in Quest Druid (both, ramp and maly), but can be replaced by legendary weapon.

HUNTER

Fiery Bat, On the Hunt

Alleycat

Cat Trick, Kindly Grandmother

Well, Aggro and Secret Hunter are non-existent in meta so loss of these cards is insignificant. But Hunter is also losing Barnes which hurts Midrange and Spell archetypes. 

MAGE

Cabalist's Tome

Kabal Crystal Runner, Kabal Lackey

Babbling Book, Firelands Portal, Medivh's Valet

In meta u can see 3 Mage archetypes: Burn Mage, Secret Mage and Exodia Mage. Exodia Mage will lose some good card generators, but I'm sure there will be printed new ones. Problem will be with Ice Block which keeps mages alive and will be moved to HoF. Burn Mage will lose some cards but I think they will replace them. Secret Mage will lose 1/3 of its deck and will be dead for sure.

PALADIN

Vilefin Inquisitor, Steward of Darkshire, Rallying Blade, Stand Against Darkness

Getaway Kodo, Grimscale Chum

Two archetypes - Dudeladin and Murlocadin. Murlocadin will lose some combo potential without Vilefin Inquisitor but still should exist. Dudeladin will suffer some serious loss; lack of Steward of Darkshire, Rallying Blade and Stand Against Darkness can eliminate this deck from meta. 

PRIEST

Shadow Word: Horror

Raza the Chained, Dragonfire Potion, Drakonid Operative, Greater Healing Potion, Pint-Size Potion, Potion of Madness, Kabal Talonpriest

Purify

Priest is very popular choice on a ladder now. U can meet Spiteful, Big, OTK and Dragon Priest. Without Barnes and Y'Shaarj, Rage Unbound and some other cards Big Priest will be gone. For OTK Priest without Potion of Madness will be much harder to make a combo (still possible with Shadow Madness and ur own minions). Spiteful and Dragon Priest should be still viable but on much lower power level. 

ROGUE

Southsea Squidface

Gadgetzan Ferryman, Counterfeit Coin

Swashburglar

Rogue is a niche class for now. You can play Miracle or Kingsbane Rogue. Miracle will suffer from Arcane Giant loss, but I think it will find da wae (as always). Kingsbane will lose Southsea Squidface and Coldlight Oracle. Without good card draw Kingsbane Rogue will leave the meta. 

SHAMAN

Thing from Below. Master of Evolution, Evolve

Devolve, Jade Claws, Jade Lightning

Maelstrom Portal

Sometimes u can meet a Evolve Shaman on a ladder and that's all. And with rotation he will lose some serious tools, like Evolve or Doppelgangster, but I think Blizz want to keep this archetype and will print some new cards for it.

WARLOCK

Darkshire Councilman, Possessed Villager

Abyssal Enforcer, Blastcrystal Potion

Malchezaar's Imp, Silverware Golem

Another popular choice on ladder, now and in future. Why? Because most popular archetypes (Cubelock and Control) will lose almost nothing. The only noticable loss will be Mistress of Mixtures (and N'Zoth, the Corruptor in Control).

WARRIOR

N'Zoth's First Mate, Ravaging Ghoul

Sleep with the Fishes

There is no Warrior. Warrior is a lie. But seriously after Patches the Pirate nerf Warrior fell out of meta. Sometimes u can meet Fatique Warrior but it's more nuisance than a threat. 

NEUTRAL

N'Zoth, the Corruptor, Y'Shaarj, Rage Unbound, Corrupted Healbot

Dirty Rat, Doppelgangster, Mistress of Mixtures

Medivh, the Guardian, Barnes, Arcane Giant, Book Wyrm, Netherspite Historian

Thanks for putting this together!