All I want, regardless of the construct of the chapter is Kaido alluding to him either holding back or something more with his powers.
Luffy never truly "roflstomps" major villains. It always ends up being a bigger struggle than anticipated, even with a new form.
What I "hope" is that this comes in the form of Kaido legitimately fighting back, not a time limit for Luffy or JUST the expense of him taking his lifespan to keep the heartbeat going. Kaido definitely needs to have an Ace up his sleeve to fully escalate the fight in the end.