So something interesting. When they go through all the current fights, only Killer vs Hawkins and Law/Kid vs Big Mom are specified as announced vs matches on the title cards.
For Neko, Sanji and Zoro, it makes sense we didn't see this because they all "arrived" to those fights only this chapter. Next time Oda goes back to those scenes, you may see those title cards.
So what's weird is that Raizo vs Fukurokuju is not mentioned this way at all. And we have to wait and see how Apoo/Drake and Inu/Jack are addressed, possibly next chapter. But does this mean something else is supposed to fight Fukurokuju?
Anyway, this may confirm Killer/Hawkins and Law/Kid vs BM are permanent fights.