Luffy will beat Kaidou First indeed
But the difference is that Kaidou will get Up again but Luffy doesn't
Imo all Straw Hats will team up to Finish Kaidou (Like each one having a Role in the Combo) & Zoro delivers the Finishing Blow
In Thriller Bark, Straw Hats fought Oars without Luffy & then he came & Saved them
Now, it will be opposite, Straw Hats will save Luffy & finish Kaidou
One Yonko for Straw Hats ---> Kaidou
One Yonko for Supernova ---> Big Mom
One Villain Yonko for Luffy 1 v 1 ---> Teach
One Friendly Rival Yonko for Luffy to Surpass ---> Shanks
This way, each Yonko falls differently with Straw Hats Crew + Supernova + Luffy Himself being the Greatest Forces of New Generation