he wont get this arc
cant say about future arcs
personal opinion dont think he gets it. people trying to use narrative patterns to justify why this person has it and the other doesnt are wasting time. oda isnt consistent with such, asking why should sanji get it is more relevant here.
zoro's was heavily hinted and we all assumed he was simply intimidating.
however it seems to reach a certain tier
its almost a requirement, so sanji may well have to, law as well. however its also possible am wrong here and coc is just so prominent in wano as fs was in wci. in such case they arent getting it.