It looks like the study was completed, but never made public - here's the only thing I could find:

A new study commissioned by the Michigan Economic Development Corp. on future uses for Historic Fort Wayne is complete, but the state is not yet ready to reveal results.

"We want to present the study and its findings at the appropriate time," Dave Murray, deputy press secretary for Michigan Gov. Rick Snyder, said of the study of one of Detroit's oldest historic sites.

http://www.crainsdetroit.com/article...under-scrutiny