Yes, we do love to see that fight in the future, Casimero has been trash talking Inoue when they both have the belts at 118 lbs and probably could have face each other.
Casimero and Inoue is supposed to face each other on April 202o but due to pandemic the supposed face off between Casimero and Inoue was cancelled and never had a chance to reschedule until now. After the fight was cancelled and the heat of provocation of Casimero (when he had the title) to have a fight against Inoue, Inoue released a statement that he isn't interested to have a unification fight against Casimero[1]. Probably that was the reason why many Casimero fans thinks that Inoue is ducking casimero. Then later when Casimero was stripped of the belt, Inoue decided to have a unification fight against Butler.
And now Bob Arum wanted Inoue to have a straight journey to title fight disregarding the ranking (probably influenced the WBO officials) by making Inoue WBO Super Champion. What ever the reason it do look like Inoue is avoiding Casimero at all cost.
[1] https://www.spin.ph/boxing/naoya-inoue-doesnt-want-anything-to-do-with-johnriel-casimero-a793-20211225
Can't really say that for sure because the time was not on their side in the first place and because of the pandemic and its ever growing variant, both camps decided to part ways and face another boxer that will be catered in their available timeline. Anyway, let's just put that behind and hope that someday in the future, their path will cross again because they are now in the same weight class again.