Here is what I know, see below tax map of the lots.
The Zamperla Thunderbolt is on lots 170 & 190, these are city lots.
The original Thunderbolt stood on lot 105, it and lot 89, where the Playland Arcade stood, are owned by Jasmine Bullard. She inherited the land when her father Horace passed. The remaining lots I believe are all city owned. Also see link to Horace Obit, this says the lots are on the market for 90 million, but a later New York Times article notes that Jasmine took the property off the market.
http://www.brooklyndaily.com/stories/2013/17/bn_bullardsidebar_2013_04_26_bk.html
Tax Map