UPDATE: The long wait is over! Here is the latest "One Piece" chapter 784. Enjoy!

The new "One Piece" chapter is just around the corner and here are some "One Piece" chapter 784 spoilers for fans who are so excited to see Luffy's gear fourth.

Upon seeing the last page of "One Piece" chapter 783, fans went nuts when Luffy was about to activate his never before seen gear fourth. Now, fans are scouring for "One Piece" chapter 784 spoilers and gear fourth theories, so here are some of the most plausible theories out online.

The first theory came from One Piece Gold where Luffy makes use of his muscles to incorporate vibration into his attacks.

"A theory I have for Gear Fourth is Luffy incorporating the use of vibrations into his attacks." The website wrote. "With his rubber body Luffy can create vibrations/enter into a "vibrating state" through rapidly stretching and contracting his body (vibrating his muscles). By hardening his limbs with Haki, Luffy can amplify the vibrations created within his body and apply them to his attacks where the vibrations being produced within him are transferred onto and into his opponent when the attack lands. In effect Gear Fourth will allow Luffy to perform piercing/focused attacks with vibrations that can bypass the defense of his opponent."

The website further added that Luffy might have got the inspiration from the Happou Navy's "Hasshoken" and Whitebeard's Gura Gura No Mi.

Meanwhile, YouTube user Alpha2late17 posted his theory of Gear fourth which involves vulcanization of muscles.

Gear second involves pumping blood faster, and Gear third involves inflating bones. Gear second enhances speed through blood pressure while gear third enhances strength through bones. Gear fourth vulcanizes the muscles, resulting in great strength while still retaining speed. Watch the video below for an in depth explanation.

The chapter will be available by Thursday, April 23. Fans can check "One Piece" chapter 784 spoilers and raw photos on Manga Mint five hours before the release of the translated chapter.

For more weekly "One Piece" chapter 784 spoilers, stay tuned here.