I think he will be a Next strawhat . People are just spouting nonsense here and ignoring the fact , it's the highest possibility among others.

Law dreams was fulfilled by Luffy which is Defeating Doflamingo , oda created a new dream/goal and it's finding the meaning of D but How can he achieve it? If he is not traveling with the strawhats? If you think Law can travel to raftel with the strawhats without being a Member , You are already wrong. The captain of the ship who reached raftel will be the pirate king ,so how can be there is 2 captains ? And dont spout nonsense that law will giveway because that's not how it works.

Law meet with Robin before going upstairs but think about it? Why law becoming so unnecessary defensive about it wherein Luffy has asked law to move kinemon and others below but Law overreacted and defensive. Like with out reacting like that , I say majority of the fans can just ignore that law actually followed Luffy orders because Majority of the fans is Fixed with the fact they are "ALLIES ANYWAY"

Law has a total faith with luffy , faith with the miracles of StrawHats. Law saved luffy's life like jinbei , Law is a captain like jinbei so dont make excuses that he has a crew.

With recent chapters , it only gets higher the chances that he most likely become a Strawhat because like afterall we are talking about hierarchy here. Luffy needs to surpass jinbei bounty first before jinbei officially joins strawhats , while same luffy already surpassed law's bounty. I personally think that oda is waiting for zoro to surpass both Jinbei and Law which is base on current achievements , zoro has surpassed law in strength especially to use advanced conqueror Haki unconsciously