Johnson v. Derevyanchenko 8-25?

According to boxrec, this fight is set. Winner becoming IBF mandatory for Golovkin-Alvarez winner. One question and one implication here. Why the hell would they not put this on the GGGCanelo PPV? Golden Boy represents Johnson, if he wins, wouldn't they want the American people to see it and build up a fanbase? It would be one more great middleweight that Golden Boy has to match around. The implication we can draw here is that Tureano Johnson is not therefore in line to face Jacobs, who Golden Boy was talking about being on the undercard. The only other legit middleweight they could have against Jacobs is Jason Quigley. Now last info on him was that he would have to miss the PPV due to a broken hand, but I did note that he had a twitter/instagram post about returning to the US to get back to work. If it's not Quigley GB could feed someone like Texeira to Jacobs, but I'm not sure why they would sabotage their own fighter like that.