Yup! The box is called the Maggoth Lord; $76 USD; makes either a Lord of Nurgle, Sorcerer-Lord of Nurgle, or Herald of Nurgle riding a Maggoth.
A lot of folks have asked "Why Nurgle?" right now. As part of The End Times, Nurgle is ascendant amongst the gods. Both the machinations of the Skaven and the necromancy unleashed by the return of Nagash has catapulted the lord of entropy's plans forward. Thus can he unleash his most potent horrors yet upon the weakling southlands. I wouldn't worry though-- nothing ever works out for the Ruinous Powers quite the way the expect, and I bet that the other gods see some new units as well in the near future.