So I just thought of something. I'm getting Thriller Bark vibes from the spider that Brook and Robin fought, with Saturn's DF. What if Saturn is meant to be an Oars like boss this arc.
If that's the case, we know Luffy got a temporary powerup in Thriller Bark from the shadows, and what if that's going to happen here on Egghead.
Now obviously there is no shadows to power him up, but hear me out. WHAT IF, Bonney ages Luffy by 10-20 years, and his strength grow to what it would be at 30/40 years old?
So far we've only seen Bonney age people really old, or really young. What happens if she ages them to Prime age?
Bonus points. Bonney shares the same theme as the Big Mom pirates, and in Thriller Bark it was Lola who helped Luffy become nightmare Luffy with the shadows.