Even if Inoue received Casimero or Gaballo, the results to those fights seem obvious to the 99% of the members here, really. Probably a knockout in the mid rounds at most.
Donaire is close to pushing 40 and isn't going to be hanging on much longer unfortunately.
But when a fighter hits as hard as Inoue does and has a name for KOing pretty much everyone that he encounters, it's hardly unreasonable for him to move up a weight class and challenge someone for a belt there.
Unfortunately, he's not going to be facing Lomachenko because the weight percentage difference between a bantamweight and a lightweight is the same as the percentage difference between a light middleweight (154) and a light heavyweight (175)...
But really though, Naoya could probably make Flyweight if he really wanted to.