I don't know if he even will get a PU.
He should go by with what he has.. Luffy has certain distinct features over others, with which Oda could potentially expose Kaido.
He's extremely agile, small, fast and has FS, while within G2 he has great mid range attack speed,
He normally should be able to find his way around frontal clashes, if we are getting technical, but I dunno if Oda even considers this route.
It's what he already did in 1010 basically: parry and counter.
Hopefully he does though, because I certainly do not like that "bigger boom wins" development that every Manga seems to follow near its end stage.
So I would be a little disappointed if one of the most skilled martial artists just runs into a gigantic monster like Kaido while hoping it will work out somehow, cause that's just dumb tbh.
And now that we have already seen the sky splitting stuff I just hope he goes for decent strategies.
With that said I hope he gets a new attack prefix, indicating CoC internal destro usage, so "hawk" and "elephant" are now named after something celestial or royal.
And with those advantages he brings Kaido down, who then activates his awakened form for which Luffy goes into G4.. Something like that