Not sure how this relates to my post, but I never really believed that Jack is only 28 years old.
I know... I know hahahaha
It's just this same panel brought back to my memory the discussion on why is Jack looking adult when he's 28 years old. So I kinda talked about it.
But yeah, I'm one of the people who believe there is an Ace anyway.
This is also because It's very important to note that EVERY character in Kaido's crew from the higher echelon, they represent the card NOT ONLY by their rank, but also by their NAME.
As an example,
you can try and rank people like:
Ace
King
Queen
Jack
10
9
8
and so on until number 1
And people like Jack/Queen/King are not only representing that in RANK. NO, it's actually their name itself. Their name itself is Jack, Queen and King.
And when you take that into consideration.
You will realize that Sanji took out "Page 1" Who is the LOWEST of the highest members" from the enemy forces.
I can imagine that Diez Drake "Diez meaning 10" is the one right after Jack.
And in that sense, I know many say that Kaido can be the Ace. But Kaido's name is NOT Ace. While EVERY member we saw, they do not occupy the rank only, but their name itself is that position. So, basically the Ace of Kaido's crew will NOT be Kaido, it will be someone who has the name "Ace" itself.
So, yeah. I believe Kaido has an "Ace"
Also people from 2-9 will be some of the "Numbers" and "Flying Six"