He can always have Barto come back to say Jimbei is VC looking how cool he is or Sanji after knowing his Germa origins and more feats for him. Barto is impressionable especially he consider 'God Usopp' after all XD.
Which wont happen.
Leaving Jimbei aside who is new to the crew, have you never wondered why noone in the entire OP verse ever confused Sanji as the captain or thought of his as right hand or vice captain? It has been over 970 chapters and it has never happened to Sanji. Matter of fact it has happened to no one other than Zoro.
Honestly Oda had no reason to make Barto say Zoro is the right hand and vice captain. He could have left it ambiguous or waited till Jimbei joined if he planned on saying Jimbei is the vice captain.
If Oda's intention was not to inform the readers that Zoro is the vice captain and right hand, why create an entire panel justto do that
Sometime we just have to accept things as is and move on. Just use deductive reasoning and look at the evidence provided and it is clear that Oda's intention is fofor the readerand also OPverse characters to view Zoro as vice captain and right hand man.
Sanji was stated to be the advisor for the crew in the vivrecard. Not sure why people are downplaying this and forcing issues to try and claim he is vicecaptain. As an advisor he is tasked to advise which we have seen him do multiple times in the series and he does this well. However, vice captain is Zoro's job which he does well