Cronología de Raids/Dungeons en Cataclysm

Patch 4.0.3a (previamente habían borrado emblemas viejos, cambiado los achievs, modificado las ramas de talento, etc.)

Level cap raised to 85

Horde Goblin and Alliance Worgen races added

New level 80+ zones added

Tol Barad World PvP zone added
Archaeology secondary profession added
Throne of the Tides, The Stonecore, Vortex Pinnacle, Lost City of The Tol'vir, Halls of Origination and Grim Batol dungeons added

Blackrock Caverns, Deadmines and Shadowfang Keep dungeons updated to level 80+

Argaloth, Bastion of Twilight, Throne of the Four Winds, Blackwing Descent and Occu'thar (aunque Occu'thar esté en la raid, dicho boss no se habilitó hasta la versión 4.2.0) raids added.

Patch 4.1.0

Re-opening of Zul'Aman and Zul'Gurub as level 85 heroics
Class design changes
Profession trainers filled out in capitals

Patch 4.2.0

Firelands is added
New Molten Front daily quest zone
New Avengers of Hyjal faction
Dungeon Journal
Occu'thar has broken free from his cage and presents an all-new boss challenge to players in 10- and 25-player arrangements who control Tol Barad.

Patch 4.3.0

New and improved Raid Finder
Introduction of Transmogrifiers
New and improved Darkmoon Faire plus new zone: Darkmoon Island
End Time is added
Well of Eternity is added
Hour of Twilight is added
Dragon Soul is added

Fuente:
http://wowwiki.wikia.com/wiki/Timeli...d_of_Warcraft)

Occu'thar es en season 10 so, no estaria en 4.0.x pero lo demas esta bien

http://www.wowhead.com/guide=cataclysm&pve

es la misma basura pero bueno muestra solo lo del primer tier decia

Ahí lo aclaré. Debe estar mencionado en grupo porque la raid a la que pertenece se abrió en ese momento, aunque el boss no estuviera habilitado todavía.
Gracias.