Unfortunately, we've got no clue where N'Zoth has been lurking since his escape. We do, however have an idea where he might strike.
Back when the keepers were imprisoning the Old Gods, they built defense mechanisms against their corruption into the titan forges. If N'Zoth wants tae corrupt Azeroth, he'll have tae go through them first.
Fortunately, we've got ourselves hooked up tae them now, so we can monitor them from here. Go ahead an' take a look.