In Thriller Bark, all the SHs did face Oars but it was Luffy who finally defeated Moria.
Similarly for final fight this arc to be a tag team fight, and for Zoro/Sanji to face Kaidou even after beating King(+Kyoshiro/Orochi) /Queen, there must atleast be another oppponent for Luffy(there ain't bt BM) and so Luffy must KO Kaidou solo in the end.
Afterall Luffy is the Protagonist of the show and must get the maximum fame out of all this.
Though i wouldn't mind SNs tag teaming Kaidou, they also are supposed to rise Big after this incident, bt it's shame Oda didnt do anything to hype em up for the final fight.
Neither are their opponents clear at this moment, which inclines me to put em against Kaidou or BM in Tag team fight.
I mean King n Queen are out of options, and so is Jack, if Jinbei arrives or Inu/Neko faces him off, which leaves us with only Smoothie n Perospero for the SNs( if Ashura or anyone doesn't face em), who again are good opponents for Drake, Hawkins n Killer bt not for Kidd n Law, given Zoro n Sanji are also facing YCs. Drake n Killer might also tag team Zoro n Sanji against King n Queen.
So Yes for me personally Kidd n Law are indeed up against Kaidou or BM at some stage in the final fight.
(Tho any other opponent can be used as hypetool to build em up for final fight.)
Conclusion, I think Zoro might get to try Cut Kaidou at some point(some chance), bt that's about it is his role with Kaidou and none of the Other SHs are getting any chances with Kaidou.
Other than that it will be Luffy, Kidd n Law mainly against Kaidou. They will all awaken in that moment and Luffy will be the one to land final hit on Kaidou.