User blog comment:TheWiseAnon/Luffy v, an admiral/@comment-1168530-20100902011258

its worth notcing, Sanji has a trend of fighting underhanded people; Gin, Kurobi, "Bon-Bon", Jyabura, Absalom, Wanze, all of them are pretty messed up (all be it Bon-Bon redeemed himself).

So if Sanji were to fight someone, it would be the most evil of the three. so Akainu sounds like the kinda guy he'd fight, that and they both fight with super hot substances. unless Sanji were to fight the new unknown admiral