He can match with other boxers that he haven't taken yet and I guess that's where he should focused first before aiming for someone like Inoue again.
A rematch with Inoue is not even close to happening. The time Nonito Donaire will take a shot again at the Bantamweight title, Inoue might be at the point now where he challenges boxers in a much upper-weight division (probably at 122 lbs up) which is possibly his next task after becoming an undisputed champion on the bantamweight. Adding to that, it's not even sure if all of his future fights will be a Victory for him.
Right now, it's Paul Butler's WBO title left for Inoue that needs to steal and he will now become an undisputed bantamweight champion. If that happened, no more challenges were left in that division, and moving-up weight is the logical thing that he will do next. He's also catching age that's why as much as possible, he will still at this best shape once moves up.