I’m only fine with Sanji v Queen if Zoro v King happens.
Otherwise I wouldn’t like it, like who is suppose to fight King then? Oda has been pushing this new era way too much, so I don’t see Marco having a 1v1.
Plus for me King vs Sanji has the potential to be one of the best fights in Op if done right.
Aerial combat, while building King’s character and diving into his backstory. I just don’t see an important character like that fighting a side character(Marco).