The main fight of the Arc is Luffy vs Kaido ahahaha.
Yamato is cool, but he will never be relevant to the manga like Zoro, Sanji, Ussop and other characters that have been there for years.
A fight like Kid and Law vs BM, with the two main members of the supernovas, that Oda has highlighted since Sabaondy, fighting a Emperor, and probably winning, is much more relevant to the story, as it change all the world balance and put the WorstGen as the new big fishs of this pirate era, with jist Shanks lefting from the Great Age of the Pirates genaration and no one from the Era before that still in power. In this arc even Zoro and Sanji fights against Kaido main commanders is more relevant, as it will finally put Luffy main guys att the level of the other Emperors main executives, a thing we have been waiting for years to happen in preparation for the final Saga.
I understand that u like Yamato, but take it easy man, u starting to sounds like Zorot4rds that think they favorite character is the new protagonist of the Manga, and at least Zoro have been in the story since the start as one of the main SH for them to think it. Yamato have a cool desing, but the character is not much more than another princess with daddy issues, isnt like we haven't seen a dozen of those since the start of the manga, it was even the theme of the last Arc.