I sware to god that somewhere along the lines someone in the blue posts mentioned that Yogg-Saron had his hand in all the madness going on in the world of Azeroth. Included in this bat shit of craziness was the king of Stormwind being the Anti-Thrall, so there may be your connection to the throne room. The other rooms could mean that Yogg is somehow involved in what's going on with Arthas and then the possible connection to the Obsidian Sanctum/Wyrmrest rooms. I'll go and search for that post... brb in like 20 minutes unless someone finds it / posts it faster.