If you have any questions about content and timeline, read this thread:
viewtopic.php?f=2&t=4Silithus & CC related:
http://puu.sh/etJ7n/896f576e24.jpgUnlike every other private ever made (as far as I know, at least) - Nostalrius is progressive release, and not just dungeon / raid content wise, but also zone / reputation / general item balance wise.
There's a ton of content in Vanilla WoW that didn't even exist until long after launch and lots of reworks, buffs, and nerfs to all sorts of content, among that are updates and buffs with time to hundreds of items.
Whether Nostalrius will crack down on every single content and release them on launch in the proper pre-buff / old version of itself, we'll have to wait and see.
But that is something they've already announced doing with quite a lot of content, as mentioned by the devs themselves on much of the discussions had about said topic, as well as in that Timeline thread that they update every now and then with new info on everything Timeline related.