There's no clue as to where the second one will be located (but we're trying to find out -- our first query received the response that "the location for these hotels has not yet been determined" hmmm), but the site does say it will open in 2016, which is just one year after the first Edition New York's projected opening date.
UPDATE: A super-secret hotel spy just told us that it will be in Times Square.
The site also appears to confirm the rumored Shanghai (2016) and Paris (2017) properties, bringing the total number of Edition Hotels in development to 11 -- Miami (2014), Bangkok (2015), Abu Dhabi (2015), Gurgaon (2015), Sanya (2015), Wuhan (2017) and West Hollywood (2017) were the ones we already knew about. That's a lot of Editions!
Meanwhile, at the Madison Avenue site, illuminated scaffolding is running up the building and the light in the gilded cupola has been turned back on, marking progress since our last visit in April when the historic MetLife Tower had gone completely dark.