In the recent chapters the Kaido of the Beasts appears in his dragon form. He destroys Oden’s castle with devastating fire breath. That got me thinking, he looks too strong and invincible. I think, right now, there’s no way that Luffy and company can even scratch him.
In one of the last page of the chapter 922 we saw that the beam that Kaido shoots is going to hit the Straw Hat crew, there’s no way they can avoid that.
Luffy immediately responds by punching him in the head with Elephant Gun. The face of Kaido looks like he’s going to say in the next chapter “oh, a big fly, gtfo.” I mean, look at the difference of size, Kaido is huge.
In my opinion Kaido will proceed to mess the Straw Hats up pretty bad, putting Luffy’s life at risk.
Luffy’s life being at risk will cause his Vivre Card to start to fade, drawing the attention of the Grand Fleet to Wano.
This is where the mass of Luffy’s forces will come from for this war. Though I believe the real fun comes when we flash back to Reverie after Luffy has been captured by Kaido. Sabo will be in the middle of his plan to attack the Celestial Dragons when he notices his brother’s Vivre Card fading.
This will cause the plans to go awry. What happens from here I can’t say it’s to unpredictable. But if these sequences of events unfold we should be in for one hell of a ride.
*Theory by The Mountain Hermit
