It could eventually be another developer, and not Extell that builds here. There are currently smaller hotels on site. It will be consolidated into one footprint shown below (# 17)
Google maps view of the site and surroundings (right side)...
Lexington
50th Street
Currently the largest building on site is the W New York...
Dick Johnson NYC
It would be opposite one of the great hotels of Manhattan, the Waldorf...
Dick Johnson NYC
And accross from the Benjamin...
Dick Johnson NYC
Site 16, the InterContinental, could also be redeveloped with another large hotel...
Dick Johnson NYC