http://www.openmarket.org/2009/11/10/pfizer-to-close-facility-behind-kelo-case/
Electric Boat bought it from them. I work there. I am going there tomorrow. Electric Boat bought it from Pfizer to house the engineers they would eventually hire to work on the OHIO Class replacement project submarine. I am not sure what your point is. Pfizer did not develop every parcel of land, but Pfizer did build a huge building there, for about 350 million dollars. EB got it very cheap when Pfizer left.
I think you will see it is developed.
In general, I believe you and I can agree about the goverment seizing property. This property has been developed. I do not believe to the extent Pfizer promised. Pfizer left, and will never come back. The building Pfizer built, and Electric Boat bought, is currently the largest property tax payer in the entire city of New London.