Have you even been reading the discussion or did you just reply to this one comment?
The discussion is about the theory that Joy Boy sent the One Piece into the future. If this is the case, the Twenty Kings never truly won at all, they would have incentive to follow the One Piece into the future to fully defeat Joy Boy.
They left Imu behind to serve as their warden and keep the world stable until their return.
Do you believe the Holy Knights can live up to the legacy of the fucking Twenty Kings of the WG? Lmfao