Luffy is strong, but he has yet to reach his true end-of-series power level in One Piece.

Luffy could have another transformation after Gear 5. Oda has already set it up in One Piece.

Luffy has a new Yonko Level Ally. This ally will shift the scales in Luffy's favor in One Piece.

Luffy is a powerful Yonko, but Oda reveals a pirate even stronger than him in One Piece.

With the One Piece series moving towards the ending, who are the major characters Luffy will or are likely left to face in ...