If you look at Kaido's crew it's not just the sheer numbers that match strowhat numbers but also the way the crew is structured. For example, Kaido has two females in his crew just like Luffy, Kaido has swordsmen right hand man "king" just Like Luffy "Zoro", Kaido has technology using left hand man"Queen" just like Luffy "Sanji", Kaido has a Fishman as his third commander "Jack" just like Luffy "Jinbe", Kaido has Who's Who, who is the second strongest after commanders and also uses sword just like Luffy has Franky, as second strongest after his commanders and also uses sword in general Franky form, Kaido has Sasaki as his third strongest after commander who is also a sword user just Like Luffy has Brook, Kaido has X Drake who isn't that much interested in fighting for Kaido just Like Luffy has Ussop who isn't interested in fighting for his own reasons, Kaido has a young crew member "Page One" just like Luffy "Choper".
There is no doubt in my mind that all the strowhats (including Luffy) will have their 1v1 fights in this arc. I've said it multiple times and I'm saying it again "there's going to be a moment in Wano arc where everyone are defeated and the only one who will be stending will be Kaido with his crew and Luffy with his crew" and that will be the final round of this war.