New teaser trailer added to the OP.
So the trailer pretty much confirms that Luke no longer sees the light and dark sides of the force as good and evil. This is "barrance" that was prophesied.
Maybe so. From watching the trailer several times now listening to what little dialogue there is and now seeing the throw-back poster, I personally think Rey might be trained in a new unconventional way.
She'll probably be like Selene from the Underworld franchise. Selene had both Vampire and Lycan abilities, and Rey I think will be trained to "balance" between the light and dark side.
I don't think any character in the official Canon has been able to juggle both before successfully without succumbing to one or the other - although I believe there's a non-Canon Jedi that had done so successfully (I think his lightsaber was white?)
Anyway, that's enough nerd talk for one post.