Nah its not cause Queen looks bad....(though last chap didnt help him).
Its that Queen just does not match the aethestic of a Sanji opponent. Unless he has another form that makes him slimer and faster than he wouldnt be such a useless opponent. But we know hes a Zoan user so his only other forms are Full Zoan and Hybrid. And his Full Zoan form looks fat and slow af.
Queen just doesnt suit Sanji. His boosters and flight technology will be wasted on him. Not only that....but King will be wasted on Zoro.
Like ive stated Zoro's opponents dont fight with Sanji....and vice versa, until theyve atleast got set-up with the other one.
Again I dont think Zoro will be fight Queen. He has his set up with Kaido and Orochi...the 2 antagonists of the arc. He will reopen Kaido's scar and defeat Orochi.