User blog comment:Sararew1/Gol D. Roger and Monkey D. Luffy/@comment-200.57.95.127-20170527182509

Would be that the will od "D" be reincarnation??

That's the power of the ancient kingdom. Theirs will reincarnated in someone of the D lineage come time after, just like the Poseidon power in the Gyojin island. This could be the reason why WG baned the study of Poneglyps, to prevent the descendents to remember theirs pats life y march against the WG again.

This could be the reason why Silvers Rayleigh help Luffy, he knows that his captain will reborn, and thats tha meaning of their comentary "I will not die, my friend".