Lol its busted up. It ain't in any condition to fight Saturn and be able to then carry the sunny. Kizaru 1 shotted Vegaforce so Saturn would do to same to this. Its also far away. The blatant contextual clues are Luffy activating the drums of liberation, fighting Saturn and "liberating" Bonney, and her /getting reminded/connecting the dots. Simple. It being the ancient robot or even Kuma makes no sense ignoring his condition considering it was Kuma thats in the flashback telling her that about the warrior of liberation and its lore, but then he himself showing up and Nika, not/AKA Kuma just lied. Lol.
At best Kuma will show up to witness Luffy in his G5 form freeing Bonney and both of them getting the epiphany
This moment has been foreshadowed since 1061:
>Bonney asking about his form
>Luffy telling her that when his free
>Bonney not understanding it "what does that mean"?
Cue 1095 "will he free me too?"
Literally everything is point towards Luffy regening and saving and freeing Bonney here.