Eiichiro Oda will do as he pleases in the final saga of One Piece. Gear Fifth might be the biggest teaser of this, with Luffy's "I can do everything I wanted to do!" sounding eerily similar to Oda's "I think I've reached a point where I can do whatever I want."
Source:https://www.cbr.com/one-piece-eiichiro-oda-have-fun-final-saga/