De Naxxramas solo se sabe lo q presentaron en la Blizzcon y lo q dijo Tigole en una entrevista del NY Times...
http://blue.cardplace.com/cache/wow-dungeons/330830.htm
Q. What can you tell me about Naxxramas?
A. Naxxramas is going to be the most difficult thing in the game until the expansion pack comes out. It will be the pinnacle, and it's absolutely massive. You'll see this big necropolis floating above Eastern Plaguelands. It's a 40-man raid zone, and it's bigger than the Undercity [one of the main cities in the game]. Things could change, but we're up to something like 18 bosses in there, and they are really cool, too. But it's going to be hard. Really hard. We're hoping to release it in the spring.
Q. Will we need to open Naxxramas with a big farming event like Ahn'Qiraj?
A. No. Naxxramas will just be open. But we do want to do a world event, which we want to call the Scourge Invasion, or hopefully something cooler than that, that would basically be something for everyone who's not going into Naxxramas. So they would see the impact without having to actually go in. [In other words, get ready for undead to pop up in some unlikely places.]
El mapa d las 4 alas d Naxxramas:
http://img128.imageshack.us/img128/1033/naxxramas7gd.jpg
Por lo visto la instance sera tipo SM/DM, 4 alas (Nerubian wing, Abomination wing, Undead wing y Death Knight wing) y 18 jefes divididos entre ellas (5-5-5-3), hara falta todo tipo d resistencias, pero sobretodo shadow y frost para Kel'Thuzad, ya q dicen q no ira solo, sino como Rend d UBRS ira montado en un dragon d hielo (aunke hay rumores q apuntan a q el dragon sera otro jefe a parte en la antesala, no se sabe a ciencia cierta). Tb se rumorea q no será como AQ, 4 jefes faciles y lo demas dificil... dicen q sera chungo chungo d principio a fin y q C'Thun es un chiste comparado con Kel'Thuzad...
#30 digo yo q eso dependera del GM q pilles, los hay simpaticos y los hay con unos humos... xD