Could they be the same person? Their looks are similar, same nose, same eyes, and even the hair line looks similar. Am I just over thinking? I think not.
The Roger pirates figured out the will of D, the secret of Ohara. This probably has something to do with the 100 years period that the WG erased from history. And Rayleigh said to the SH that even if he told them what it was, they would not be able to do a thing. So who would be able to do a thing? Maybe Roger, but not as the man he was, it would probably be too hard as a king of the pirates to change the world into something better and bring down the WG. So that’s why I think he somehow came up with this “sickness” as an excuse to turn himself in and then get officially executed so that everyone would believe he was dead. How he would fake the execution I have no idea, maybe with the help Garp? Because Garp would be Rogers father according to this theory therefore giving him a reason the let Roger live on. And as a new man Dragon, Roger could start changing the world as revolutionary instead of a pirate.
This would also explain Dragons ambition, and how he could grow so powerful.
What do you think?