someone on youtube called Big Smoke has an interesting idea about what happened in the last 2 pages
he says that we already have a split view of future and what is happening right now at the end of the chapter
! Look at the "Coloring" in the last 1 1/2 pages. It seems to me that grey shows what is happening right now and white what is going to happen in the future.
In the bottom right panel from the second last page, Luffy and his outfit are grey, when an arrow is flying towards him .
In the following panel he is white and gets hit by the arrow in the right leg
Next two panels of him, we see him grey again and he realizes that there is no arrow in his right leg (yet).
! On the last page he sees Katakuri go for him in the future (first two panels) and we see that he starts moving away at this very moment in the third panel, where he is grey again
Last panels portray him white again and show what will happen in the future if he doesn't dodge.