Which means if you want to see Naxx in its 40 man version, do it now -- I believe, as I said way back when we first heard about this, that this is the first time Blizzard has removed major content from the game completely (though it's certainly not the first time they've removed something, poor Captain Placeholder). This, of course, also leaves up in the air what's going to happen to all the items around Naxx -- what about Atiesh? Not to mention lore -- we hear that the fact that a group of players beat KT and took his phylactery and returned it to the Argent Dawn is mentioned in the expansion already -- but how did that happen if the dungeon won't be there any more?
Blizzard will probably clean it all up, and I'm sure that out of game, it'll make enough sense. But it's a shame to officially hear that 40 man Naxxaramas as we know it, the jewel of patch 1.11, will soon be gone forever.