Cant blame Campbell on inactivity, Guzman was at fault for the last fight and its hard to fight any other fighter sanctioned by one body unless the other sanctioning bodies agree. I think Campbell should just start dropping these trinkets and aim for the JMM/J.Diaz winner.
Barrera could be his next fight because he is the WBC mandatory. But the winner of JMM/Diaz is option since they both most likely want Nate.