Some possibilities:
Stealth Black Raid Suit comes back and merged with Sanji just like Peter Parker tries to wear Venom thus we got black hair evil Sanji.
Or
Sanji learning about the origin of DJ so he can upgrade it even further into black flames (by unlocking Adv CoC or maxed out CoA).
If...
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.