He's the best Sanji opponent ever. He's clearly the Sanji who accepted Germa, in personality. To spite him and reach the mindset of a king, Sanji has already brought his racism and insecurities with Jinbe full circle.
Physically, it's eyelashes vs eyebrows. Everyone deemed the evil mirror a Black haired Sanji, and look at this guy's hairstyle lol. Killingham has a fruit and magic designed to resemble Sanji's mutant healing factor, and even exceed it. Sanji wanted a DF that he thought would make his dreams come true, Killingham are a fruit to make dreams come true. The spear of Imu and Rimoshifu vs the spear of Nika and Zeff; they both share the spear of Vinsmoke, Killingham tangentially while Sanji genetically.
Power wise, he's clearly a bigger threat than Queen. You technically can't beat him unless you're a conqueror, but being a conqueror isn't even a guaranteed victory. With his healing factor, you might have to put him down permanently to get anywhere (we haven't seen them knocked out). Even then, Zaza provides tremendous leverage so he doesn't need to fight clean. Like Sanji, his cleverness means that he doesn't have to rely on sheer combat prowess. And while a lot of people are thinking Imu is on borrowed time, the opposite is also true: if they can't hold Imu long enough then he'll swoop in to save his knights like he did in the first place.
A victory over Killingham should be a 2.7-3.3 billion bounty.
