There has been some discussion in the official WoW gold forums.
This jives with the early news we've had about the new Ruby Sanctum instance. It'll come as somewhat of a surprise if the loot from the new boss is really on par with the ilvl 284 gear that can be obtained from The Lich King's heroic version. I suppose it isn't that unreasonable since this instance will probably have to tide over the raiders that do manage to master Icecrown Citadel on heroic difficulty.This seems to reinforce the idea that the new encounter will be similar to how Sartharion was back when the highest tier of raiding was Naxxramas; some high level off-set pieces that aren't absolutely necessary but are well worth the effort.There has been some discussion in the official WoW gold forums about the limited attempts and how to get to the Lich King in Icecrown Citadel. Blizzard had the following to say about the rationale around limiting tries and what you can access before getting to the Lich King.It also clarifies that you will be able to access each of the new wings even if you have not defeated one of the other wings, as long as you have gained access to the upper spire.The purpose of the limited attempts is to really challenge players and we felt that was a really important aspect of Icecrown Citadel as the grand finale to the story of Wrath of the Lich King.Each wing is independent and you are free to explore them in the order of your choice once they are open.