Seemed pretty creepy to me when he was first introduced. 'Surgeon of death'. Ricky port incident. Working with shady characters like caesar and helping to experiment on kids.
He wanted to gain luffys favour in the future as a bargaining chip at that time. Nothing more nothing less.
Yes that's whitebeard and this is law. He literally couldn't care less if he died after offing doflamingo.
Yeah garp is gonna be represented by someone in the marines e.g. akainu/coby. WB I hope will be kidd. Theres also gonna be Blackbeard as luffys main antagonist. Law doesn't fit in.
So if you never implied that then tell me how exactly will Zoro achieve his dreams - if there are Swordsmans stronger than him come eos ?