The previous user of the Gomu Gomu no mi was set to be introduced in One Piece: Film Red.

The Gomu Gomu no Mi is a Paramecia Devil Fruit in One Piece that grants the user phenomenal flexibility, allowing them to turn into a rubbery entity literally.

One of the biggest twists in 'One Piece' lore was the revelation that Luffy’s Devil Fruit wasn’t the Gomu Gomu no Mi, but a mythical Zoan-type fruit tied to the ancient figure Joy Boy. While ...

The Gomu Gomu no mi is a legendary Devil Fruit, and Oda even reveals the previous user in One Piece.