Habe letztens eine wirklich schöne Theorie gelesen, die ich so toll fand, dass ich sie hier mal posten möchte:
"Guys, it's easy:
"The belonging you seek it's not behind you, it is ahead" = not a Skywalker, for now.
The Chosen One lightsaber chooses Rey = connection Anakin-Rey!
Anakin was the Chosen One and no one is going to change that - because GL would die

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and more than everything he (anakin) is the hero of all this fary tale (from ep. 1 to 9).
And in a 3 acts hero's journey, the 3rd act (=3rd trilogy) is the tale of the Hero's return...
Return = that he has to share with the ordinary world the lesson he learnt. The wisdom he gained.
That could be done, in 3 ways:
- 1st:
The Chosen One (PT); his child (OT) and his grandchildren (ST) carring that wisdom to the ordinary world.
- 2nd:
Since the Chosen One is the "special weapon" for "special times"
he and thus his bloodline must be the exception in a ordinary world that survived for millennia
without the Chosen One and his bloodline playing any part.
= the Skywalker line has to end, but the legacy must survive through "ordinary" heros.
In that galaxy far, far away, a Jedi - even a powerful Jedi - is still an ordinary being. Because the special "heros" are the Skywalker.
Using Oscar Isaacs words, the legacy will be carried out by "surrogate" children: inside the Resistance (Poe),
inside the Jedi Order (Rey) in the rest of the galaxy (Finn, or Rose, etc..). For the sake of this discussion, things don't change even if Finn
will become a Jedi or a Resistance leader etc...
-3rd:
My favourite because it's the only (at least for me, for now...) chance that may not contradict what's being said (or done) by the characters in TFA or elsewhere
nor a statement from KK, to Hidalgo, to the directors etc...
The Chosen One shall come again, as Jesus will do, as King Arthur is supposed to do, as many other heros are supposed to do.
But no, Rey is not Anakin reicarneted. Because her belonging is ahead not behind. Right?
Therefore Rey (and her name = Ray of Light) is that First Light the Clan was searching for
As Snoke is that Source of Dark Power (it's the damn same thing form opposite sides: source/first) Sidious was trying to reach.
They will fight the ultimate fight Light vs Dark, but...
She will carry (literally carry) a child. The Chosen One that has to be born again (ahead not behind and that's why his lightsaber choose her).
The saga will end with baby Anakin n°2 and his mother, under a twin suns sky at down and that music we know very well.
Lineage (not "parentage") will be the matter.
And she will be important - as Colin Trevorrow said - not only in context of the ST, but of all the saga.
Her child, will build again the Jedi Order, because
"this will start to make things right" and "without the Jedi there cannot be balance"
= the Chosen One's mission was not to kill the Sith
(which is not the Jedi way) but to restore the Order.
Side note, if so:
Ep.3 ends with Yoda telling to Obi Wan that Qui Gon "has come back". But we don't see his ghost.
Ep.6 ends with the Force Ghost, steep forward.
Ep.9 will end with an actual re-birth, the final steep forward."