Following on the heels of Blackfathom Deeps’ unexpected return, it appears Razorfen Kraul and Razorfen Downs have been given similar treatments. New npcs, new mechanics (such as traps you must disable in Kraul, or a deadly plague mist covering portions of Downs) and new stories. In Razorfen Kraul, they quillboar are harnessing the powers of strange crystals that may be related to the Twilight’s Hammer, while in Razorfen Downs the scourge works to ressurect the lich Ammenar the Coldbringer.
Unfortunately both instances are heavily glitched. Upon entering the second boss’s room in Razorfen Kraul, the alpha crases. In Razorfen Downs, the first boss cannot be defeated properly, instead respawning after several minutes and preventing you from moving further in due to a wall that’s supposed to go away when the boss dies.
These videos show their dungeon journals (not nearly as complete as Blackfathom’s, Razorfen Downs does not even have model viewing yet) and what portions of the instances I was able to access.