One Piece is purposely holding Luffy back as his greatest power has one major issue and the manga must solve it.

Given that Luffy cannot take on both Kizaru and Saturn at the same time, he will need aid and this aid could come from Sanji, who is the only one capable of holding down Kizaru other than Luffy.

Is Luffy really that strong in Gear 5 mode? Or was Kizaru holding back in the battle against the Strawhat in One Piece's Egghead arc?

At first, Vegapunk was holding a conversation between his ... Previously, fans saw Luffy hold Saturn and Kizaru in his grasp powerfully, claiming that he would not let either of them go.