Davy Jones is a Royalty!

I think D_ D _ Joyboy and Davy D Jones are like Loki and Hajruddin. But Joyboy is Hajruddin and is loved by everyone. Davy Jones may have hated him for this and Imu took advantage of this in order to take over and kill Joyboy.

Not sure how Davy Jones turned out to be after that I hope he is a cool guy.

Added theory: Oden and Joyboy may have a parallel with how they got defeated. Joyboy may also have been betrayed or stabbed in the back inspiring people of D to fight against Imu.