ok, guys, you won't believe me, but I got it all figured out now
this is the original story of episode VIII
Snoke is not an ancient sith lord. no way palpatine and/or the jedi would not have sensed him.
no, Snoke is completely new.
He is a scientist, maybe an archeologist. an expert on the force. driven by envy and the desire to be a force wielder himself.
in his work he found or created a device that could extract force energy from objects and empower himself with it
he is that collector we heard rumours about, the graverobber. he looked for and found vader's mask, luke's lightsaber and many other artifacts. he extracted force from them and became quite strong.
that was not enough, though, he wanted the ultimate power, he wanted to extract the energy from Luke, the strongest Jedi ever.
so he sought out Ben Solo, a young Padawan who struggled with his powers, he was weak.
He promised him he could make him as strong as Vader, as his grandfather. He has an artifact that could extract and transfer force powers. but he needed to capture Luke for that, his uncle.
he convinced him.
Ben Solo and a few others formed the Knights of Ren and massacred the academy, they captured Luke and brought him to Snoke. he imprisoned him and started slowly taking his force energy. (yeah, it was probably midichlorians, get over it)
With that power, Snoke rebuilt the Empire and turned it into the first order under his supreme leadership.
this also explains why the empire was silent for 30 years. Snoke took time to gather his own power and rebuild the empire.
what did Luke do? feeling his power disappearing he had to find a way to tell his friends where he is.
He took one of Snokes new artifacts, his own old lightsaber, and stored a map within that could be played by R2D2, an old droid he knew very well. but he did not know where he was, or the resistance, he knew where an old friend of his was: Lor San Tekka on Jakku.
With the help of the force, he guided the lightsaber through space for many years, until Lor San Tekka found it and alerted the leader of the resistance, General Leia, who sent her best pilot to retrieve the lightsaber.
the rest of the movie is more or less the same.
but all of this had to change, because someone, late in post production, figured that they will run out of Skywalkers at the end of episode 9, because the only Skywalker is a villain. and that can't be.
So they had to make last minute adjustments to make Rey a Skywaler, but it only makes sense if Luke hides her there. so no imprisonment, no lightsaber, no artifacts, nothing. and it all ends up with 2 dumb maps and an R2D2 who activates for no reason.
this explains why snoke and rey have 0 backstory, why no one knows why they are looking for Luke, why it's not explained how or even that the first order became a huge threat so fast, every flaw in the movie's setting.
they now have a year to somehow save this mess.
you heard it here first, cheers