But everyone is speculating that it will be Casimero who will be in ring side. Not sure what is the intention is, maybe they just want to throw off Inoue as both of them have been trash talking and have been in the radar. Unfortunately, Casimero wasn't able to fight Butler so he lost his belt already. But who knows, maybe he will be next in line for Inoue win or lose against Donaire.
If it is Casimero that would be in the ringside then it would be for Casimero to witness how it will be done (defeating Inoue) lol.
Kidding aside, without the WBO belt on his hand, Inoue is not interested in fighting Casimero anymore because the main goal for the Monster is to unify all 4 belts in the bantamweight division so Butler could be next in line for the winner of this Inoue-Donaire fight besides Casimero will be moving up in weight so his presence in Japan is just a mere spectator and might be Rachel will manage his career in the future.
He doesn't have a bargaining power for now, as you have said, no belt so no future fight with him and Inoue. Just sad that he has to rebuild his career again and he is not getting any younger although Nonito proves that you can bounce back even if you are nearing 40 years old.
Let's hear if the Japanese crowd with boo Casimero or if they are aware that Casimero wants to fight their boxer.
That wouldn't happen, Casimero will always be interested in fighting a champion because he knows he did not lose in a fight, so he still thinks that he is a champion. However, for a popular boxer like Inoue, he is not the only one who will decide on who to fight, it's his promoter that arranges the fight and they don't see Casimero as a great opponent for Inoue that could generate good revenue.
Boxing is entertainment, therefore it's mostly about the money it will generate.