Eiichiro Oda was able to turn things around in One Piece with a twist about Imu that no one saw coming because he could be an alien.

Eiichiro Oda's creative genius is one that can bring forth anything without warning. One Piece has always been open to some of the most bizarre ideas and it creates this reign of endless possibilities in a way that not even the best could achieve. With the wild theories going around, there's no doubt that Oda's limitless imagination can somehow cater to the audience.

Imu's identity is as sinister as reality in One Piece. None of the fans know what and who any of them could be and it is through theories that there has been a bit of information. Of all the possibilities, one that strikes fans quite exceptionally is that Imu is an alien.

Some of the most iconic anime and manga have introduced the concept of aliens with Akira Toriyama's Dragon Ball as the epitome of the genre. Even when the chances of an alien connection don't seem justified, there seems to be a way in which the road gets paved, an example of Naruto.