From the WSJ article (behind a paywall, but I was able to read it in the Apple News app.)
The hotel is due to stay open until sometime in 2020, according to a person familiar with the matter.
could be longer than that .. it needs approval from state and city. Includes air rights from the terminal as well.
Can see a version of the article on Bloomberg ... (and I'm sure showing up on every blog on the planet real soon now.)
https://www.bloomberg.com/news/artic...r-office-tower
-David