No one (force ghost or not) said, "Hey thanks, you just fulfilled the prophecy!"
Damn, Lucas really missed out! I'm envisioning a Las Vegas-style neon sign descending with flashing lights, confetti and showgirls coming out on stage, maybe with a few Ewoks thrown in for good measure, all doing the yub-yub dance.
Frakkin' Star Wars is worse than Lost. The more they explain, they less we know.
Anyway...since this story is apparently starting from scratch (again), here's what I think makes the most sense: Anakin clearly isn't destined to be a Jedi or a Sith. But since Qui-Gon and Obi-Wan went and butted in and frakked everything up by taking Anakin to train as a Jedi when he was supposed to stay on Tatooine till called to the Force World, the upshot of the Force World arc will be to make Anakin start thinking of some destiny for himself that transcends both groups, since objectively speaking, it looks increasingly obvious that neither of them really know what's going on in the galaxy.
Both Jedi and Sith understand little pieces of the picture, which they use to their own political ends. Why should the Chosen One feel bound by the rules of either group? I wouldn't!
Anakin will leave the Force World, of course, but he will remember what he's learned there. So every time something happens that cheeses him off - the Republic looks corrupt and unworthy of his efforts to defend it, the Jedi Council are being buttheads regarding Ahoska (not sure what exactly but I think there's a showdown regarding her in the future), the Jedi won't take his fears about Padme seriously, the Jedi won't let him on the Council - he can't help but think "why am I still hanging with these clowns? They're dragging me down!"
And when Sidious reveals that he's a Sith, why would Anakin be particularly offended by, or scared of, this? The Sith are just little ants to him, like the Jedi. (In fact Anakin's reaction in ROTS is not blase enough).
The key here is that Anakin is doing to see himself as someone with power over both the Dark and Light Sides of the Force, so siding with the Sith is no more "evil" than siding with the Jedi. His line from ROTS about "from my perspective, the Jedi are evil" is nonsensical now. What he really should be saying is, "from my perspective, the Jedi and Sith are equally clueless. Turn over all power to me, and I'll show you chumps how it's done."
I love Sam Witwer's quote above. Did he decide all that about his character or did Filoni tell him that? Either way, it works wonderfully. The Light/Dark Sides are just like Kirk in "The Enemy Within." A whole person can't do without both, a whole galaxy can't do without both. (EDIT: I see
Christopher beat me to it.)
Again a version of the literal text was written out by Dan Wallace but he was forced to remove it, he speculated at the time it was because Lucas Film intended to touch up on it again and thus they have in the series.
Thanks, I was wondering whether it ever saw the light of day, but I think it's obvious now what it is. Bringing balance to the Force means literally controlling both sides so that neither gets too strong. Anakin doesn't want to be enslaved to the Force World forever because he's gotten so he enjoys charging around the galaxy waving a lightsaber and having a hot wife to go home to. Presumably the original plan was to drag him off to the Force World before he had a chance to check out other lifestyle options.
But now that he knows the truth about himself, why wouldn't Anakin start to wonder if he can balance the Force in a more metaphorical way, by remote control, by controlling both Jedi and Sith? He's supposed to be able to control the elemental forces that give both their power, so why shouldn't he be able to run both sides with ease, and have the Force-given right to do so, too?
He's already a Jedi, and now this Sith guy wants to team up. The gears are clicking in his mind. The problem with the Jedi is that they are too pigheaded to understand Anakin's radical new vision for the galaxy, and there are too many to control. So he teams up with Sidious and whittles the Jedi down to a reasonable number. Then he plans to off Sidious as well, eliminating all currently active Force-sensitives, and rule unilaterally with Padme handling all the political stuff.
It's easy to envision Ahsoka being part of this plan, especially if she's in exile because the Dark Side didn't wear off entirely or something like that. Anakin will need someone to help rebuild a new order of Force-sensitives, except this time there won't be any childish divisions between Jedi and Sith. But then Obi-Wan fraks that plan up, too. Obi-Wan sure likes to interfere with the will of the Force! It's a wonder he hasn't been zapped with a lightning bolt by now.
