One Piece manga is about to end the Egghead Island arc. As soon as the Straw Hats arrived on the island, they ran into trouble with the Marines and the Admiral who were besieging the island. Things became even worse when Gorosei – the Five Elder Stars appeared. The group then plans to escape to Elbaf.
One Piece chapter 1117 tells about the clash between Zoro and Nusjuro when the elder tried to attack the Thousand Sunny. Warcury attacked the Iron Giant and stopped broadcasting Vegapunk's message at the most important moment, just as Vegapunk was about to reveal information about those bearing the letter “D.” in name.
The battle continues in the new chapter, ending with a major deciding factor of a certain presence. Well, One Piece chapter 1118 might hint at Luffy's new power.
In One Piece chapter 1118, Luffy finally reaches the giant's ship and starts eating as soon as possible to regain energy. Luffy then encouraged Bonney to use her amazing technique. Bonney's “distorted future” allows her to change shape and temporarily take on any form she wishes.
While Luffy and Bonney get ready to fight Mars, Ju Peter and Warcury sense a strange presence from the giants' ship. Despite being thrown into the sea, the Iron Giant felt the same presence.
What we know now is that the Five Elder Stars saw Luffy's Gear 5 form. Bonney's imitation of Luffy's form does not mean she has become Nika. It was just an expression of her freedom.
Since the Egghead Island arc, Luffy has become more in tune with his powers. Even though he eats a lot between battles, it's clear that Gear 5 form drains so much energy, it would exhaust him in no time.
In Wano, Luffy said that Gear 5 was his peak. However, Luffy hasn't even reached his full potential. It is very likely that the Five Elder Stars are feeling the strange power coming from Luffy. Since he is the “real” Nika, the Iron Giant can also sense his presence. Previous chapters have shown the Iron Giant in action whenever Luffy is in Gear 5 form.