
Originally Posted by
Kaylia
The 4th one will be evil for sure, just look at his face and resume (killed moria's crew, tried to backstab whitebeard during the War).
Whitebeard crew is already on Luffy's side since the War.
Shank is known to be a good guy. I don't expect any issue with him even if they end up competing with each other.
Big Mama seem a bit greedy and self centered (she asked Fishmen to make a candies factory in exchange of her protection), but she is still protecting people for a small cost. Because Luffy most likely saved her daughter, I just can't picture both fighting each other for very long.
This is not to say Oda won't spice things up with a few twists, but I'm not expecting any major arc that involve Luffy fighting a Youkou other than that 4th guy.