... before he died...
It has something to do with Roger looking for the man he's been waiting for. Well, at chapter 576.
"You're not one of them"
- Someone from D family. The chosen one.
"The men that Roger waits for... are a very rare... but not you, Teach. You are not one of them"
- Those of the D family who carries the will of D.
The chosen one will carry the burden of protecting what ex-generation carried before. It passed from older generation to Roger to Ace to those who carry the same Roger and Ace's will. It's been like that for hundreds of years.
Those of the fallen country will fight the World Government and the world in grand battle. One Piece is an ancient weapon and carries all history of the fallen country. The name of that fallen country starts with D.
Theory made by:ArabianLuffy (Admin from other forum)