Honestly 5 star chapter just for the straw hats alone. The darker tone with Sabo adds more to that tho I don't think he's dead, he will probably not contact Dragon with a den den mushi anymore after seeing the implications of what revealing that secret means, until he comes into contact with him himself.
Or Dragon finds him in the seas a throwback finding him in a similar situation again, Sabo amnesia part 2.
Seems like he purposefully called them without wiretape so that the Marines could hear what he has to say too, a lot of implications with that.
Just like I said in my last post of the spoiler thread, that shadow/figure looks like a triangle, got illuminati vibes from that. It's probably Uranus for sure, Imu might be capable to control it somehow.
Bonney might drop more bomb shells once she wakes up, perhaps she saw his exitence too.