Well, there were those who speculated that the real form of kaido fighting was the dragon, this chapter comes to close it once and for all, and furthermore, it proves that its dragon form is inadequate to fight swordsmen, its human form and his hybrid form are the best for this, which proves that the only solution found by the author, ODA to make Oden cause a mortal wound in Kaido and almost to overcome him, was to make Kaido use his dragon form (weaker and inadequate).Well, I don't blame the writing here, because oden would have to lose to Kaido anyway, but he would have to do a feat to pay for all the humiliation he suffered over 5 years. Kaido in human form would leave no opening for this, so the essential that oda found was dragon kaido.
Kaido> oden is a given.