Unconfirmed, but fascinating, from a BHB tipster:
I live across the street from the Purchase Building and wanted to pass on a tip regarding the space now created by the demolition of the Purchase Building. In speaking with one of the foremen from Sanska, the contractors overseeing the demolition, the DOT is making a very aggressive bid to gain control of this new space under the bridge for the next 4-5 years to store equipment and vehicles in connection with their plans to make extensive repairs to the Brooklyn Bridge. From what he can tell the DOT is winning the argument with the Conservancy and the Mayors Office. So I guess another part of the new park bites the dust.