As title represents, luffy's alliance with big mom. How will the alliance beat kaidou as they hardly beat DD who was just an underling working for kaidou. Yesterday I was watching episodes of thriller bark again where lola states that her mother was a big pirate in new world and it can be that she was talking abt big mom. Lola also stated there that she was born in new world and she always adress people with zou after peoples name so it can be possible that she was born in an island zou where laws crew is. And big mom is chasing sanji and gang for Caesar so it is possible that she wants Caesar so that she can stop the production of smiles so that she can take down kaidou herself bcoz maybe kaidou is rite now the strongest younkou bcoz he was strengthening his force with zoan fruit. So I think that after dressrosa arc, oda will create zou arc where sanji and team had already discussed about their mutual interest i.e Caesar and nami will also tell her about how they help Lola back in thriller bark, which will lead them to make alliance before even law and luffy arrive there. And I also think that laws crew has already talked with kid and their alliance to become temporary alias to take down kaidou. But big mom will make an exception in this alliance bcoz Lola was never arrived to zou after gecko moria was defeated bcoz there it was shown some mountain like creatures back at Florian triangle if you guys remember. So nami will gain big moms trust by showing her vivre card given by Lola back there.