It's more of Casimero-Inoue that has already been saying before but there's no contract yet and that's why WBO managed to order and got in before their match. But again, it became unknown and we still have to wait until it comes.
It's only hyped here in that thread but on the overall market, the hype is not yet big. Promoters may be thinking that it's not time yet to re-organized the Casimero vs Inoue match this December. No problem about the numbers that Inoue can attract but for Casimero, he needs to make his name bigger. He was mandatorily assigned to Butler as a challenge for him to make big sounds again if he won.
Yes, it's more of us boxing fans wanting to see the fight happen, and then Casimero and Inoue go on a verbal tuss on their social media. But after that, it didn't materialized, so it's all hype for now.
On the other hand, Butler's name will make sounds too if he beat Casimero. No easy win for Casimero here like others think. Butler should be considered as a serious threat for Quadro Alas.
Casimero though, has used to this kind of fight, going to the boxers home, and then just destroyed them in from of their fans. It's no easy task, but Casimero has done that many times in his career, Butler is no exception.