Well...while we're waiting for something to happen with Central Station, Transwestern has some very good renderings on it's leasing brochure for the office space. If this tower even remotely comes out looking like the renderings, it's going to be one of the nicest looking towers in Phoenix.
http://twwest.net/Team_Fijan/Brochures/CentralStation_LeasingBrochureTW.pdf
Edit: And on Loopenet:
https://www.loopnet.com/Listing/300-N-Central-Ave-Phoenix-AZ/22510287/