reincarnation in the one piece world as the prince of the kingdom of D

a young man who is reincarnation in the kingdom of D nd when the war breaks out he will be taken to a future where the 12 year story will begin.

A few notes before you read this Fanfic.
It's not going to be a rushed story. It's going to take time and go through things slowly.
One Piece world only, no world traveling.
While the Main Character will be strong.
The story will be following Luffy and the others for a while. This is for two reasons, one it helps me write and two, the Main Character actually has a valid motivation for doing so.
No harem.