Imagine Luffy after Wano have Zoro , Sanji , and Jinbe on board he will be at the same level of the Kaido and BM's commander at least. more than that i have no doubt that Yamato , Law and Marco will be on the sunny.
reasons :
Marco would want to help against BB as well
Law wants to know about the will of D.
Yamato already asked Luffy to be on the sunny since he is Ace's brother.
Luffy's crew is gonna be overpowered which mean they might have to fight some admirals and CP-0 before they can fight black beard.