I'm actually quite surprised how this isn't a common thinking.
Right now the difference between Sanji's (330) and Zoro's (320) bounty is- 10mil
After Zoro beats King (1.33bil) and Sanji beats Queen (1.32bil), Zoro will gain 10mil more than Sanji- thus equalizing their bounty post Wano
This probably will be 2nd to last bounty increase. And after battle with Blackbeard pirates, they will get final bounty increase where Zoro will be ahead of Sanji (probably by 1 belly).
Right now the difference between Sanji's (330) and Zoro's (320) bounty is- 10mil
After Zoro beats King (1.33bil) and Sanji beats Queen (1.32bil), Zoro will gain 10mil more than Sanji- thus equalizing their bounty post Wano
This probably will be 2nd to last bounty increase. And after battle with Blackbeard pirates, they will get final bounty increase where Zoro will be ahead of Sanji (probably by 1 belly).
Let's be real, King's bounty is going to be 1.33bil