User blog comment:Ghmorello/Chapter 887: Hot Pounding/@comment-192.64.124.119-20171201164149/@comment-24850639-20171201171954

Agreed, and I think the last chapter validated that. Luffy will be getting some kind of power boost that at the very least allows him to fight on par with Katakuri, and Rayleigh's comments make me feel like Luffy's fight with Kaido will be learning on the go as well. I just hope the option to run away isn't available in that fight like it has been so far when G4 runs out. At the very least I feel Luffy will advance his observation haki in order to match an opponent who knows his next move almost at the same time he does, and he'll need to upgrade his armament to compete with Katakuri's as well. Whatever this power up is, I think Oda has to set it up in a way where it clearly boosts him for now, but there's also much more potential for him to expand upon it. I'm assuming Kaido would smoke Katakuri, so Luffy being able to beat Katakuri won't mean much on it's own.