Casimero is only in the rank 7. If anyone deserves the shot to a title, it's Luis Nery but even him was skipped by Innoue all for unification. There is a possibility that Inoue will move to 126 lbs and probably skip all but challenge Robeisy Ramirez. After all, he already beat Fulton which is below Robeisy so fighting Fulton I think is more of a strategy to get the WBO belt from Robeisy.
The most exciting is the welterweight class which I think Inoue will stay longer to fight top ranks.