First, anyone who has not read it, read Aohige's explanation of why Sabo's alive.
Now, oh hey, listen up, dandy boys and annoying girls.
I believe that Sabo, in his reunion with Luffy, will bring up a new point of view about freedom, which may eventually effect/change Luffy's point of view somehow, or lead to a conflict.
You may say that I am probably over-thinking about a children comic book, but look at these two panels:
[hide]
1.
2.
[/hide]
First panel:
Sabo is questioning the true meaning of freedom, the right way to obtain it. He is wondering whether his choice to become a pirate will lead to the true freedom. He is reconsidering the path he had chosen before (as he said to Luffy and Ace:"Let's break out of this country and become free, as a pirate.").
Why did Oda show us this panel? If Sabo just set sail right-out to the vast sea as a pirate, with out a doubt in his choice, then why did he have to ponder about the definition of freedom ? If he just believed that to become pirate is to become free, why did he have to question where freedom lies? If the only way Sabo could see is to become a pirate, then the panel is unnecessary. If this is Bleach, then the panel may indicate nothing. But this is One Piece, where every panel is on purpose, every detail is possibly a hint.
What made Sabo reconsider his choice was definitely the Terminal Gray incident. Assuming that the people at trash mountain are dead, Sabo yet couldn't do anything for them, or couldn't see a way to do anything for them. And he didn't. He detested his hometown, yet couldn't see a way to change it, couldn't see a way to prevent events like that from happening again. He just decided to escape from it, for himself to be free, leave the "trash-people" in risk of being burned again, leave the poor people in suffer of being suppressed, leave the noble kids in the corrupted environment and education that would just make them look down upon other humans. He abandoned his hometown to become free. Was he questioning that choice?
The second panel:
Assuming that Sabo is dead, Ace yet couldn't understand what "killed" him, couldn't see the root of Sabo's problem, couldn't see the right way to revenge Sabo properly, couldn't see a path to change what caused the "death" of his brother, couldn't do anything to "the thing that's opposite of freedom". And he didn't. Like Dadan said, it's not just tenryuubito, the nobles, that "killed" Sabo. It's their country. It's their world. It's the ideology that has existed through many ages and been accepted as obvious truth. It's the way of thinking that has been carved deep into people's mind through many generations. Being a pirate, even a powerful one like Pirate King, wouldn't be able to change that. Ace and Luffy, at their age, couldn't comprehend that, and just decided to become pirates, and saw it as a way to inherit Sabo's will, leaving him in a sore and bitter death of an unsolved problem.
Oda showed us the panel with Ace admitting his inability to see the problem, for what purpose? The only intention I could see is that, Oda will later show us some scenes with Sabo explaining to Luffy what pushed him to the verge of death, what prevented him from gripping freedom, and his way to deal with it.
I believe Sabo is now a revolutionizer.
Sabo at the time he set sail, also couldn't see any path to solve his problem with his hometown other than escaping from it, and almost faced death because of that unsolved problem. But Dragon saved him, and showed him that way. The way of revolution. That's what made Sabo a revolutionary. That's what changed his point of view. That is what make him give up on the path of a pirate. Dragon, an open-minded man, a man whose thought advanced his generation, a man who let his son live his life the way he wants, wouldn't force Sabo to become a revolutionizer if he still wanted to be a pirate. All Dragon did to change Sabo was to show him his thought, show him the root of the problem, the true face of what oppose freedom and that what a man must do is to face his opponent, face the thing that prevents him from becoming free, and fight it, and change it, change this world, not only for himself and his loved ones, but also for the whole world.
Sabo decided to be a pirate when he was, like, 5 years old, and keep that intention until he was 10. As time changes, human changes. People grow up, even in this manga. If I am Oda, after Dragon successfully overthrows the WG, I will let Sabo become a man like Norland, who also legally went on adventures and wrote about them.
Since the theme of One Piece right now is freedom, I can see Oda thinking about freedom much more than me.
–------
As for Luffy
[hide] He decided to become a pirate and see it as the only way to achieve the highest form of freedom, and to him "adventure" mean "pirate" since he was 7 or even younger. Too young of an age to decide what your life will become, especially a life involving such questionable things like piracy. For a kid that loves adventures, to become an adventurer is more appropriate. When Luffy becomes the Pirates King, as his father is the leader of a new world order, how will their relationship turn into, with the whole world knowing they are father and son? How will Dragon continue to let him roam free as an outlaw, a criminal that people of the world see as a terrific menace, yet maintain the trust of people? Based on this, if I am Oda, I won't let the ending of One Piece is as simple as Luffy becoming Pirate King.
And Luffy right now, has temporarily lost his confidence in himself, his happy-go-lucky manner, and begun to question his whole journey. As brilliant as his character development goes in the masterful hand of Oda, I doubt he will maintain his old point of view about pirates, like other typical shounen main characters. Ace is dead, and he was captured because he was son of a big criminal, adopted son of another big criminal, and a big criminal himself. Will Luffy ever question about the fate of a Pirate King once his time's over, with Roger as exampple, whose friends and related ones was hunted by the government, and according to Moria, pretty many were executed, including Tom (cause he did commit severe crimes to be seen as demon by the world like destroying a whole army of a country, slaughtering Squardo's crew, being seen as responsible for Shiki's half fleet destroyed, encouraging people to be outlaw and making ordinary citizens suffer piracy, etc. , other than just knowing the true history)? Without any goal such as putting an end to the WG, will Luffy be able see how much disaster he will bring to Makino, Nojiko, Iceburg, and others once he dies as the number one pirate while the WG still exists? And even if the WG stop existing, how will the new government led by Dragon handle such a criminal like Pirate King?
The thing is, will Oda ignore that?
[/hide]