We already saw Law use White Haki/Power of Love to save the Heart Pirates from having a huge lesbian orgy while the Blackbeard pirates gooned in the background from... uh, feminization.
The Power of Love is positive Haki, the Power of Hate is negative Haki.
I think we'll see Evil Sanji when Nami gets hurt here.
Robin got hurt in Egghead, I think Nami's next, and Nami is a very child-coded character; Nami getting hurt trying to rescue a child makes all the sense in the world, and there's a lot of kids around, currently.
If Nami has to choose between a child getting hurt, or grabbing the kid by the thorns, she's taking the Thorns.
Oda likes doing things in 3s, and Sanji's number is 3; we've seen Sanji's eyebrows flip twice. I think this will be the 3rd time, Sommers is the kind of enemy that just straight up disgusts Sanji.
Egghead introduced "Black Flame" via Imu/Saturn. "Black Leg" Sanji, it's right there. I think Sanji with White Haki will be "White Leg Sanji" with white flame. Angelo Jambe?
