Given how Kid and Law just went all out and are basically exhausted, I think Big Mom will defeat them, and subsequently take on CP0, before having a rematch with a stronger Kid and Law.
I think the two CP0 agents are both zoan users, and I think they both have attacks capable of damaging big mom(either ryuo or roku-o-gan). CP0 will mention something about caramel and put big mom in a brief shock to do major damage to her, before also being taken out.