Law and Kid vs BM will conclude next chapter imo.
Make or break for both sets of fans.
Big Mom might go wild and wreck the two or BM really is defeated...
Whatever happens, Oda loses something in both cases.
Either a yonkou goes down in a really garbage way.
Either Law and Kidd lose & BM finishes them off, which is honestly a bigger loss. They just awakened their DF's and especially Law needs closure on his powers (like Doffy alluded to). His hidden ability will be significant for the next lore dump.
Kidd on the other hand still has room to grow with his CoC (no pun intended) and, if he beats BM, will finally get feats and portrayal.