Below are the names of 11 of the 12 raidbosses:
Arthas
Sindragosa
Lord Marrowgar
A Lich (Likely Kel'thuzad)
Sister Svalna (Val'kyr)
Flesh-Shaper Genascyde
Countess Lana'thel (The San'layn)
Deathbringer Saurfang / Bolvar (Bolvar isn't in the files yet)
Vegard the Unforgiven
Airship Encounter
Acanthurus, Balistoides and Chaetodon (Elementals)
There are also a couple of boss mobs named "Valithria Dreamwalker" and "Festergut" and "Feugen" and "Rotface". They can be adds and the 12th encounter, unknown now.
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