I could see it going one of two ways:
Luffy, Zoro, Law vs Kaido
Kid & Killer vs Big Mom
Shit luck for Kid and Killer for losing their SN alliance they made to go after Shanks but Law won't ditch his SN alliance for them. Unless they hype the two Strawhat Chads and say only they can properly hurt Kaido, I see no other reason why Law would be with Kid and Killer
Oda taking Killer out in this way (if he intends to not have him standing until the very end) would be fine with me. Afterwards Luffy can take Killers place. Being the MC and having the biggest beef with both Yonko, I expect him to be the only one to fight both Yonko the most.
Yamato eventually replaces Law (so perhaps Yamato saves Jack from the moment the SN split into teams two teams and arrives just as Law is out)
Zoro Yamato vs Kaido
Luffy Kid vs Big Mom
Eliminate the non SH and we end the arc with:
A Kaido without a head & the return of O-Lin
5 SN vs Kaido
Big Mom is teleported away and is gone just long enough for Kaido to get some serious damage and return to save him from the eventual beheading that awaits him. For whatever reason (stamina or more 'alert' BM/Kaido) the same plan won't work again, so the tensiom can be high and the Yonko can have the advantage until the very end when the SN power up & defeat them.
I think Law cut Hawkins balls off after Drake freed him so Sulong Bepo should be capable of defeating him now