 After the failure of the Anbang deal, Zaha Hadid Architects unveiled plans for a $12 billion, skyscraper developed by the Kushner organization to replace the current building.The proposed project would cost four times as much as the taller Central Park Tower and would have been the third most expensive building ever constructed.Rather than tear down the current building, Kushner would strip the structure down to its steel frame and add forty stories on top of it, similar to the process used at nearby 425 Park Avenue.