Why are you people insecure about Luffy's New Revelation?
Aside from dozens & dozens of Hints i can demonstrate to you about this DF
I have only two questions for you:
1. Why did a Yonko Crew who aren't DF Users bother steal Gomu Gomu No Mi? (And not even eat it or sell it)
2. Have you even read Chapter 100?
Chapter 100 starts with Roger Quote:
"Inherited Will, A Man's Dreams, The Swell of The Times. As long as Man seeks the answer of "Freedom" to the best of his ability, these things will never be Stopped!"
And The Chapter is titled "The Legend Begins" referring to Luffy's Journey
Which then Oda reminded us of in Chapter 1000. And btw Chapter 100 was so important for Oda to the point that he removed a Sub-Story from Loguetown Arc just so that this Chapter is the 100th.