I will write a what if and you cannot stop me.
Sabo, having the jump, lands the first hit. His Dragon Fist, clad in Armament Haki, knocks King back a step, before King attacks with his sword. Sabo turns into fire, and surrounds King, who attempts another sword slash. Sabo, appearing behind him, hits another Dragon Fist, knocking the sword from King's hands. King still isn't hurt, but he's very angry, shown by the fact that Sabo has drawn angry eyebrows on his mask. Both of them kick at the same time, but Sabo turns back into flame. Mulling over his options, he realizes he can just take King's flames away, since he controls fire.
"Is that cheating? Yes, it is. Do I care? No, I do not."
However, King is faster now. The two begin to battle in hand-to-hand combat, yet again evenly matched, but for the fact that King is far faster, until he overwhelms Sabo with Haki and speed.
Now, things aren't looking good for Luffy. His brother is dying, King is standing there, and Doflamingo is looking at him funny. However, Jesus Burgess walks up to King, punching him in the face. The two of THEM fight, and King wins again. However, all of this is fine, because Kin'emon arrives. The now-injured King is very surprised to see him, especially with Kanjuro at his side. The two scabbards start to overwhelm him, until Kanjuro stabs Kin'emon in the back. However, he, too, is stabbed, by Fujitora, who then battles and even more injured King. He calls down a mighty meteorite, but Doflamingo blocks it with his Birdcage. While Law and Luffy attack Doflamingo, Fujitora battles King, with their battles climax coming as Fujitora hits him over the head with a few gravity enhanced objects, the heaviest around, which happen to be Pica and Machvise. Now, with 2 devil fruit users dead, the Straw hats are given the fruits, which grew in a nearby orchard(i think this is how these work?), giving the flame-flame fruit to Usopp, because this is his arc and he's one of the few people there, and giving the pterodactyl fruit to the greatest crew member, Wado Ichimonji.
Now, Kanjuro, having been revealed as a traitor, is captured, and commits seppuku. His fruit is given to Nami on Zou, because her Clima-tact actually allows for some cool artwork.
Basically, Whole cake is slightly stompier, and Wano is easier too, with Zoro going directly to Kaidou instead of fighting King, and Kanjuro not betraying anyone. Furthermore, Nami, defeating Ulti no diff, is able to keep going, and take down even more enemies, and Usopp beats Page One on his own.
Things from there out stay as usual.
