1.
"Contact Queen Have Him send a Heavy "
The literal first chapter Sanji gets a moment in Wano, Queen is mentioned. He's the one who sent the Tobi Roppo after Sanji.
Queen is the facilitator of the Soba Mask Plot point. Sanji's 1st plot point in the Wano arc.
2. Quirky Nature of Sanjis Opponents in One Piece.
Characters Defeated by Sanji in One Piece typically have a very quirky/gagish Personality/Appearance. Usually Pretty ugly as well.
Queen honestly fits right in with these characters. This is not a bad thing I'm just pointing out consistencies/patterns throughout the series.
Ironically Queen and Sanji cried over Komurasaki as well. Makes you wonder if there may be some future plot point between the 2. involving Hiyori.
3. Vinsmoke Judge...
Another instance of Oda connecting Queen to Sanji, this time in the form of Vinsmoke Judge. Not only did queen start the soba mask plot line that involved sanji using his raid suit from his vinsmoke family now Oda is implying Queen knows Vinsmoke Judge in some way.
4. Enies Lobby 2.0
Onigashima is playing out like Enies Lobby for Sanji
Sanji in Enies Lobby lost to Khalifa and had to have Nami bail him out afterwords he went on to
defeat Jabra 3rd strongest in CP9 Mid Diff, and opened the gates of justice.
Similarly Sanji lost to Black Maria and had to have Robin bail him out, he's likely going to
defeat the 3rd strongest in Kaidos Crew, Queen Mid Diff and do some clutch save afterwards.
5. The Difference in Speed
Historically theres always been a disgusting difference in Speed between Sanji and opponents he defeats. Why? Because Speed it how Sanji operates, its probably Sanjis biggest attribute as a combatant. If Sanji doesn't have the speed advantage he usually does not win. Dont see Sanji being able to out speed King enough for it to matter in a fight and Jack is already taken,
that leaves Queen.......
6. Big Mom....
This is one may be controversial but
there is some truth to it.......hear me out.
Queen and Sanji both had to subdue Big Mom in order to save their comrades.
It almost mirrors Sanjis situation, where they had to briefly knock out Big Mom and take her else where to prevent her from destroying everyone.
Ironically
Both Queen and Sanji mention a ship.....
We see Queens Ship and what does it say?
"Q 03".....
7. X Drake
Sanji and Queen have connections to X Drake.
X Drake is the one Queen sent after Sanji and has pursued Sanji on multiple Occasions .
Ironically Drake also has a connection to Queen as well.
also Ironically both Drake and Queen know about The Vinsmokes which leads me to my next point.
8. The North Remembers
Out of the 4 people who have mentioned Sanji and the Germa in the Wano Arc. 2 of them are currently allies being X Drake and Law, Hawkins being an unknown entity who
could change sides any time,
So Queen is really the only one who has mentioned the Vinsmokes thats an actual threat to the alliance.
I think Law, X Drake and potentially Hawkins,
will witness Sanji fight against Queen.
And Comment on his Stealth Black abilities. Yes I think Sanjis fight will have an audience of some sort....
This may have been foreshadowed In Sanjis Soba Mask chapter. When Law says
everyone from the north blue knows.
9. History
Finally The most obvious one that people hate , but its just fact. Queen is 3rd strongest in the Beast Pirates, Sanji is 3rd strongest in the Strawhats. Its likely going to happen just because of that fact. Theres no need to complicate that shit.......We know how this shit works in arcs like these. Wano has the long Build up Alabasta had and the 2 island structure Water7/Enies Lobby had. Both arcs in which our Cook fought the 3rd. And theres nothing wrong with that.