Slashfilm has given their insight into the now revealed script from Star Wars: Episode VII! The Following is my take on what they are discussing both about the name of Planet Luke is on and in terms of history of the Millennium post Return of Jedi and in relation to Rey's upbringing on Jakku!
First is the reveal of the name of Luke's planet Rey finds him on, which is"AHCH-TO". Ahch is a Hebrew word meant to mean "Brother". Slashfilm speculates that this may imply that Luke is somehow Rey's brother, which may imply that somehow Aankin was alive was post Return of the Jedi.
Although I have another take, in which I will get to after this, I still will take the time to explore the possibilities of how this would work.
One way would be that Anakin was resurrected post Return of Jedi. I myself have speculated that the trilogy itself may explore the idea of resurrecting him, given both what has been presented in Darth Vader Comic Series (Dr. Cylo's Resurrection/Human-Hybrid Force Mimickers), Star Wars Aftermath (The Acolytes of the Beyond: Vader Relic in relation to beliefs of The After-life/Dark Side Power Source), and because of rumors that tell us that Hayden Christensen may be in training for either/or Star Wars Rogue One and Star Wars Episode VIII.
The same information could be used to support the idea that this Resurrection already happened! It's the easiest solution in entertaining this particular possibility, although it would mean she is a "half" sibling, unless Padme's eggs were harvested, although we would have further question Kylo Ren's beliefs, although it could give more weight to them.
On that note, the other might be that some of Vader's genetic material was left behind to make a kind of man-made prodigy AND we could even take this idea further should there be some Darth Plagues-like Force capabilities involved.
However, I think there is another way to look at the word "Brother". All through out Star Wars, spiritual words, including names of famous Spiritual people, have been sprinkled in names of planets and characters alike. One detail Slashfilm failed to pick up on was it's "Dark Rock Island" description.
In Empire Strikes Back, when Luke is training on Dagobah (Dagobah also refers to real-life scripture of a Buddhist relic from Ancient Sri Lanka) he goes into "Cave of Evil", which presents his biggest fears in what he must face. Some may not know, but this dark-side-cave is suppose to be strong with The Dark Side of the Force!
Going back to prequels, we also learned during The Clone Wars, that the Jedi Temple on Courasaunt was seemingly and unknowingly (to that time period of Jedi) built on top of an Ancient Sith Shrine, which is how Palpatine/Sidious is able to distort the Jedi's vision. After Order 66, Sidious reclaims the Temple and begins going through and underneath it looking for Sith Relics, which then is followed through by Aftermath's reveal that he was looking for a power source of The Dark Side somewhere on the outer realm...
So there are a few things we can take away from this information. One might be a correlation between Dagobah, Courasuant, and AHCH-TO, meaning that the PLACE is a brother to one of, or multiple other places relating to the Dark Side of the Force. I believe we learn that Luke's Temple was also the oldest and first Jedi Temple...
Which leads us to Anakin's struggle with the Jedi to begin with, in that, there wasn't transparency or full honesty with the history of Jedi and/or ideologies/methodologies of The Force. The whole thing points out that there is a missing origin story behind these things. In the prequels we are told the Sith have been extinct for thousands of years, but it is not disclosed how that happened, and of course we know that somehow they either survived and/or whose principals were revived by some Force Users....
But other things that point to this, should these places be inter-related as "brothers" and/or are basically Force-heavy counterparts are the facts that, somehow one Jedi Temple was built over a Sith Shrine and that Yoda chooses to retire and hide at a "dark-side" heavy location and that now possibly Luke had done the same!
Other possible references are that Rey has a brother too (Kylo Ren/Ben Solo) and/or she is just meant to find Liea's brother "again".
Getting Around the Story of the Millennium Falcon & Gambling Smugglers
Well as they stated in Flashfilm, we know officially that Rey ends up in the hands of Unkar Plutt upon arriving to Jakku, but there is an easy solution getting around the argument of thinking the Millennium Falcon was bartered to Plutt, when other Journey to Force Awakens stories and Episode VII tell us it was stolen. The simple solution was that IT was stolen, but Rey somehow ends up a hidden passenger during the ordeal and is either discovered by Plutt upon purchase from other smugglers and/or is bought with it.
I would lean to the idea that she found her way on board by herself and wasn't discovered until after landing on Jakku, perhaps even initially with the guidance of the Force Spirit of Obi-Wan: "You've taken your first step into a larger world.", he says in her flashback vision.
However there is also Max Von Sydow's character Lor San Tekka, whom looks very much like an Obi-Wan Kenobi/ "Uncle Ben" type of character (even Jedi-Style of dress), but it could easily be juxtaposed that Tekka's overlooking of Rey was more of an after thought once in search of her, as opposed to Obi-Wan always keeping tabs on Luke from the moment of his birth.
Tekka too might be word relating to Eastern Philosophy/History/Culture as Tekka, often relating to Sushi dishes also may translate more aptly to "Red Hot Iron" in reference to the color of the Tuna-Salmon, may in fact derive from a easy to make tuna snack eaten and served at gambling dens called, Tekkaba! So it might very well be that his character relates to all of this, especially with the irony that it is "Ben" Solo, named for Obi-Wan, who murders him at the beginning of the film.
And here's also a webiste that gives more insight to Tekka's relationship with Luke, and Jedi Lore!
http://www.slashgear.com/star-wars-the-force-awakens-who-is-lor-san-tekka-22419360/
