I don't know who Sam Goodman is but he is currently the number 1 in the ranking, followed by Neri then Casimero. Murodjon Akhmadaliev is just number 6 in the ranking, so I don't understand why Inoue had missed to mention Sam Goodman. Honestly, I don't know this guy, but I'm surprise he is in the number 1 ranking. So if Inoue will fight the challenger in WBO, he could fight Sam Goodman and then Casimero vs Nery, winners of both fight will afce each other, how's that sound?
Sounds more possible than a direct fight of Casimero against Inoue.
But let's not forget, Murodjon Akhmadaliev just won against Kevin Gonzalez for the WBA super bantamweight title eliminator so he has more chance to fight Inoue first than others.
Now Inoue said he will stick in the super bantamweight division for now but I doubt it will be that long. Maybe he will just defend it twice or three times and if Sam Goodman will be next, even if Casimero signs with MP, he will have a hard time having that chance against Inoue. Unless, like what others mentioned, if the prize pool will be too sweet that Inoue's camp cannot decline. Money can control everything, and even these organizations will undoubtedly accept it especially if they can make a lot of money from PPV and ticket sales and other ways to profit from it.
Casimero is only glorious in his country but he might be unknown to others, they would need to boost him first either through winning fights or making a trend for him on social media. I mean, that had been the way of boxers now to boost their popularity.