This morning, AT&T VP Brad Burns released a statement regarding the upcoming Softbank purchase of Sprint, and it carefully treads the line between "passive aggressive displeasure" and "seriously FCC, if this goes through, we're buying like a million carriers":

Softbank's acquisition of Sprint and the control it gains over Clearwire will give one of Japan's largest wireless companies control of significantly more U.S. wireless spectrum than any other company. We expect that fact and others will be fully explored in the regulatory review process.