This too:
No joke:
- Authoritative nature: He's telling a henchman to tell Jack to take care of this. Jack deals with the underworld trades. Queen asked Jack if he knew where to get new trade deals from after Doflamingo. That right there already sounds like he's above Jack. And he also says it so nonchalantly too.
- The fancy seat: Not trying to be funny, but the guy is sitting somewhere by himself monitoring this stuff on a pretty descent seat. No henchmen would be monitoring underworld trades by himself otherwise.
- Horns. These horns look super reminiscent of Kaido and his lineage. Granted, some headliners, Numbers and Jack also seem to have these horns, so kind of a non-argument atm. Jack and the Headliners however are fake horns. Numbers we are unsure of until we actually see them.
- Fancy/Feathered coat: Like Doflamingo, Katakuri (with his scarf), Corazon and Law it may indicate a form of class with the character.
I'd be down if this was his son, he actually would have been the first Beasts Pirate we technically see lol.
Edit: And before anyone thinks this too long of a foreshadow, realize Rayleigh appeared nearly 500 chapters before he was introduced.