ArenaNet is paving the way for the end of the current main storyline. Origins of Madness is the first big event of the year for Guild Wars 2. It's coming out on January 21 and this will see players fighting against Scarlet Briar once again.
One of Scarlet's big new monsters is the Twisted Marionette, a giant robot of mass destruction. Along with that is the new Great Jungle Wurm, a hug multi-headed creature that will require multiplayer players to take it down.