Diable Jambe, although it makes Sanji stronger is more of a technique rather than a traditional power up. It’s more of a Gear 3rd rather than a Gear 2nd/4th. I believe Sanji’s next power-up will play more with the Devil theme that Oda has given Sanji. I believe Sanji will have an emotion based Hakuba like transformation, to where when he gets angry he heats up, his blood “starts boiling” and his facial expression changes. A berserk mode if you will.
In my opinion Thriller Bark was a huge playground for Oda to forshadow future abilities and power ups. Nightmare Luffy -> Gear 4th Luffy, Sanji bursting into flames -> Hell Memories, Franky’s docking - Franky Shogun, Robin’ Big Tree -> Mil Fleur: Gigantesco Mano, Zoro burning Ryuma -> Zoro’s future Fire technique (he showed interest in Kinemon’s teqnique) … and finally the scene is similar to sanji reminds me of this panel):
so sanji will have a devil form which he reaches through anger there’s a tokusatsu that we know Oda likes, which would be a much more explicit inspiration for the Germa 66 : Kamen Rider. specifically the villainous organization shocker
Shocker was a terrorist organization that planned on ruling the world (in the original manga is shown that Shocker had some influences over the governments of the world), with virtually all of its members modified in some way. The founders had mostly Nazi ties
so it fits that germa66 not only references the nazis but the shocker organization from kamen rider
Shocker’s scientists performed surgical alterations that gave the subject superhuman fighting abilities. Even the most basic Shocker soldier was tougher, stronger and faster than the average human civilian. The most powerful of their forces were the Kaijin, modified humans who were combined with animal DNA and human cybernetics to create living weapons.
In an attempt to create the ultimate warriors, they were responsible for the rise of the very first Kamen Riders 1 and 2, whom defected and became the heroes who would ultimately lead to the fall of Shocker.
and sanji and his siblings were altered genetically
and the kamen riders specialty is the kamen rider KICK
In it Kamen Rider Black RX is a cyborg whose motif is a black grasshopper, which mirrors Sanji’s own epithet as Black Leg. Grasshoppers are known for their incredible spring like leg muscles that allow them to jump incredible heights which allow them to launch themselves in the air to fly. However he also has another motif and that is based on the sun. Kamen Rider Black RX is a photosynthetic warrior who is powered by the sun.
Since Kamen Rider is powered by the sun, he can set his legs and fists on fire to increase the lethality of his kicks and punches, which is basically what Sanji’s Diable Jambe does
and kamen rider black who sanji is partly inspired from had a transformation called the prince of anger which he transformed when he reached a certain level of anger
and this anger will cause him to transform and his hair to turn black ( oda has had many dragon ball references in one piece and this will be an inverted super saiyan and it fits for his hair to turn black since he is stealth BLack and his siblings have hair colors to match their epitaphs
I like to add that when Sanji was fighting with Judge and thought about their past, his Dj(Poele A Frire) glowed brighter than than usual.
against judge
against doffy
and sanjis raid suit is called stealth BLACK
stealth black references kamen rider black
plus on sanji resembling kamen rider black rx who is solar powered
both sanjis experience as a child and duval was a reference to the man in the iron mask .
Though based on a real prisoner in the late 1600’s who Louis XIV forced to always wear a velvet mask to hide his identity and who was made to serve other prisoners, one of the most popular versions of the story is that of Alexandre Dumas, translated into a film in 1998. The prisoner, now shown wearing an iron mask, was Louis XIV’s twin brother
sanji had encountered the same fate as written in Alexandre DUMAS book (The Vicomte of Bragelonne: Ten Years Later). Declared dead for the country but condemned to wear a mask and to spend all his life in an horrible prison
and louis XIV was known as the sun king and kamen rider black rx is solar powered
and sanjis and zoros rivalry parallels inuarashi and nekomamushis rivalry ( and inuarashi is called the ruler of the day and has a group under him that reference the three musketeers by alexander dumas (a french story ) and sanji was dressed up as a musketeer and oda said in an sbs that sanji in the real world would be french
porche-chan . tumblr . com/post/134501849916/weve-located-zoros-fashion-twinkie-everyone

We’ve located Zoro’s fashion twinkie, everyone!.
One Piece, chapters 82 and 809
porche-chan . tumblr . com/post/138118772526/i-made-an-observation-a-while-back-about#notes
I made an observation a while back about Nekomamushi and Zoro being fashion twinkies, but now that I think about it, Inuarashi is wearing pinstripes, which is an early Sanji trademark:
And as Wanda explains in chapter 809, Inuarashi and Nekomamushi seem to have a little bit of a volatile relationship, not unlike Sanji and Zoro:
I have no fully formed theories regarding this, really, but there doesseem to be a recent influx (i.e. since Dressrosa) of duos whose dynamics are reminiscent of Zoro and Sanji. They all seem to exhibit a rivalrous and/or combative temperament, but there is either a history or discovery of working well together. And they all share, in some capacity, characteristics relatable to Sanji and Zoro in physical appearance:
What I hope it means, though, is that we’re going to see some next level development in Sanji and Zoro’s relationship. Like, some Thriller Bark level type of stuff.
porche-chan . tumblr . com/post…is-an-imposing-figure?is_related_post=1#notes
Like Zoro, Nekomamushi is an imposing figure; strong, intimidating and perceptive. And like Zoro (with his naps and sake), Nekomamushi also exhibits hedonistic tendancies:
And most hilariously, they both share a general disregard for their poor, poor medical professional:

both nekomamushi and inuarashi (zoro and sanjis counterparts) losing the precise limb that could incapacitate zoro and sanjis respective fighting styles
about inuarashis similarities to sanji I have to point out that inuarashi has a group that operates under his command called the
Inuarashi Musketeer Squad Among them are three minks known as the “Three Inuarashi Musketeers”,
The name of the squad is a reference to the novel The Three Musketeers by Alexandre Dumas.
a french story and oda stated in an sbs that sanji would be french in the real world
and this could make three allusions/connections that sanji has to the sun since inuarashi was the ruler of the day
and for why this would happen when sanji sees nami get hurt or thinks she died or hears that she got hurt badly
he will lose it
this sounds like foreshadowing imagine if the transformation and awakening of the vinsmoke genetic enhancements ( which fits given his current opponent has a spider zoan )
leads to a personality change bit to allow him to hurt girls
and germa66 were compared to devils with one soldier asking if they made a deal with the devil which fits with what sanji said before
and this will lead up to him actually hitting ulti and/or black maria
on the whole hakuba aspect
“A superstar appeared”
I’m more and more convinced now that Cavendish is supposed to be the physical manifestation of everything Sanji wishes he could be (actual prince, adored by the masses, riding around on a white horse saving people), especially since he even uses phrases Sanji used years ago in this arc.
so imagine that sanjis hakuba will callhimself vinsmoke sanji and will have the personality changes that judge intended for sanji like the suppression of emotions that would get in the way of battle and would feel nothing for zeff he will be more ruthless like vinsmoke brothers
and will actually use knives/swords in the fight