I think that is what people were trying to tell you when you had expectations of $2-$3B. Old common was eliminated during the BK process and the bondholders became the new stockholders. Whether that is right or wrong it is what happened.
As of right now AT&T can only get their hands on the 46 licenses that the reorganized Fibertower controls, provided the FCC approves AT&T's purchase of the company.
The Crown Jewels, the 692 licenses that the reorganized Fibertower has an interest in, they are still controlled by the FCC.