Yes, Atlantic Yards developer Forest City Ratner plans a green roof on the Barclays Center, as I conjectured last month, based on the hint that "modifications" were planned, to be paid for in part by expected new partner the Greenland Group.
In addition to the above, the project sponsors are considering the construction and installation of a green roof on Barclays Center as a new sustainable feature of the Arena. If installed, it would consist of the construction of a secondary roof with a structural system to hold a green sedum tray system very similar to the sedum roof at the transit entrance in front of the Arena. It is expected to cover most of the roof and would consist of approximately 130,000 square feet of sedum, making it one of the largest green roofs in New York City. It is expected that installation of this Phase I component would commence in 2014.