Forum:The final villain will be no one other than Blackbeard.

It won't be the World Government. Luffy has no special interest in beating the WG. That's Dragon's thing.

Blackbeard is the greatest pirate rival of Luffy. He'll certainly be the final obstacle of Luffy. At Raftel.

Its pretty obvious, Right now he has the most strength haveing a devil fruit that can beat Ace, and Now having Whitebeards, Plus he is the main protagonist, but I dont think he'll make it to raftel.

The way I see it, Rayleigh's commentary on the Void Century heavily implies that they found out something terible about the World Government but couldn't do anything about it due to Roger's impending death. In my opinion the Straw Hat Crew will find out what happened when they arrive at Raftel, by then the truth behind the Devil Fruit's and the Will of D should also be revealed, with all that knowledge and the powers they obtained up until that point, the Straw Hat crew will trigger "The last war", an all out attack on the World Government with tons of allies. All of this is pure theory of course but it does make a lot of sense.