Speculation means nothing at this stage. Any potential suitor would face just as many financial and operational headaches as the current turnaround team. Note that one of the keys to CenturyTel's acquisition of Embarq was its agreement to assume $5.8B of the target's debt. It is not clear whether Arkansas Best or Con-Way or some other suitor would be so willing to save YRCW.
Full disclosure: No positions in YRCW, ABFS, or CNW at this time.