I think Zoro and Sanji will both have multiple fights I Wano, first they'll fight King and Queen in a 1 v 1 each respectively and it will be similar to their fights in EL against Kaku and Jyabra(about Sanji I think it's about time he uses his version of the other rokushiki techniques such as soru Rankyaku(imagine DJ slashes), moving tekkai like jyabra and flying DJ shigan but with his toes instead and kamie used in conjunction with CoO and Sanji's good reflexes, he also is yet to use black hardening and might be forced to unlock his Germa powers)
Then Zoro will still be able to be a part of the Kaido fight and will hurt Kaido using Enma while Sanji and the rest of the straw hats with reinforcements maybe from the grand fleet will stall the big mom pirates,