"One Piece" Chapter 838 is where Luffy overthrows the power of Cracker through an extreme attack and will eventually fight Big Mom.
Luffy was surprised when Cracker did not even move when he released his Third Gear attack. But at the fourth attack, Cracker trembled upon seeing the same attack becoming so powerful than the third one.
With Cracker's defeat, Luffy stepped closer to saving his friend Sanji. But Big Mom will do everything to prevent that from happening.
Sanji needs to activate Gear Fifth to ensure their win but there is no way to do that as of the moment. It is still a mystery whether a Devil Fruit of Haki would help Sanji and Luffy, or would this dilemma result in waking the monkey-devil.
There are speculations that Vinsmokes would appear in the battle and may ally Big Mom for political advantages.
There are other predictions that Vinsmokes would work with Big Mom since they seem to dislike Sanji a lot.
On the other hand, it is also expected that Nami will finally defeat Brulee with the help of Pound, one of Big Mom's ex-husbands.
Luffy and his gang are about to reunite again.
These and more are expected to happen in "One Piece" Chapter 838.
