Yep. Like I've been saying, the WG probably doesn't see Luffy as an emperor for real.
And it's all about to change
Well that's just silly, they're the ones who anointed him a Yonkou. And atleast the gorosei are aware Luffy took down Kaidou after awakening his god fruit. The reason Saturn isn't too worried atm is he probably believes they have enough to neutralize them as if they were any other Yonkou crew.
At the same time SH's losing here would be odd, the only questions are Saturn and Kizaru's fates.
If Kizaru is going down, it will either be Luffy defeating him, or the strawhats fighting together, the introduction of the photon gloves may play a part in that.
No one on the SHPs is strong enough to defeat Kizaru rn aside from Luffy. And I doubt this is going to be a major powerup arc so soon after Wano, so you can scratch off anything else.