So Order 66 theory comes true after all this time, but it's not even a 400 IQ secret plan with Dragon, it's just something nice he wanted to do for Bonney
But it's also not that useful if they don't take Saturn out for good, because then he can just get rid of the Pacifista before they're a problem. If she can control the Seraphim too though, that's a different story. She'd practically be a Shadow Monarch at that point.
Plus Elbaf giants are already on Luffy's side because they know he's the sun god. From the end of Wano we've went from the WG being trash to the WG being trash to the WG being stacked to the WG potentially being trash again.
Power to draw people to him no jutsu wins again.