do we know how much of the WoW TCG team ended up on Hearthstone? Not counting raids or dungeons, WoW TCG was at around 3 sets a year through its entire life (including its first year). I would genuinely be shocked if Hearthstone ends up less than that.
FWIW, the first years of WoW TCG looked like
2006-2007
Heroes of Azeroth 380 cards
Through the Dark Portal 340 cards
Fires of Outland 249 cards
2007-2008
March of the Legion 338 cards
Shadow of the Betrayer 264 cards
The Hunt for Illidan 252 cards
You made me look this up.
Sets
Heroes of Azeroth (released October 2006)
Through the Dark Portal (released April 2007)
Fires of Outland (released August 2007)
March of the Legion (released December 2007)
Servants of the Betrayer (released April 2008)
The Hunt for Illidan (released July 2008)
Drums of War (released November 2008)
Blood of Gladiators (released March 2009)
Fields of Honor (released June 2009)
Scourgewar (released November 2009)
Wrath Gate (released May 2010)
Archives (released August 2010 - foil reprints from Heroes of Azeroth to Fields of Honor)
Icecrown (released September 2010)
Worldbreaker (released December 2010)
War of the Elements (released April 2011)
Twilight of the Dragons (released July 2011)
Aftermath: Throne of the Tides (released October 2011)
Aftermath: Crown of the Heavens (released February 2012)
Aftermath: Tomb of the Forgotten (released June 2012)
Timewalkers: War of the Ancients (released October 2012)
Timewalkers: Betrayal of the Guardian (released February 2013)
Timewalkers: Reign of Fire (released July 2013)
Bonus sets
Periodically, bonus card sets are released independently to mark special events or dates.
Burning Crusade Set - A set of 3 cards to mark the release of World of Warcraft: The Burning Crusade. Two Heroes of Azeroth starter decks were included alongside the exclusive cards.
Wrath of the Lich King Set - 2 exclusive cards were included in the Collector's Edition of WotLK with 2 March of the Legion starter decks.
Cataclysm Set - 2 exclusive cards were included in the Collector's Edition of Cataclysm with a starter deck and a Landro's Gift loot card.
Feast of Winter Veil - A special collector's set released in November 2007 which corresponds with the holiday in the online game. This comes in a presentation box which contains a booster pack from Heroes of Azeroth, Through the Dark Portal or Fires of Outland, a deck box and 10 Winter Veil themed cards, as well as 2 vanity pets.
Darkmoon Faire - A special collector's set released in September 2008 which includes 5 preset Darkmoon Faire themed cards and 2 Through the Dark Portal booster packs.
Arena Grand Melee - A small collector's set released to supplement the Arena theme. This was released with two decks, one for the Alliance and one for the Horde.
Why the heck did they discountinue it? it seemed like a success.