A thing I posted somewhere else but I don't want to change the wording for a new post
".Okay, so I don’t know if this theory has been thrown out there yet, but I have been thinking a lot about this moment (Kylo reaching out) from the trailer. I just don’t know how they could follow it without it seeming cheesy. If he is reaching out to someone, anyone, if they take his hand, where does it go from there? They just walk off into the sunset? That background looks pretty hectic for hand holding.
But…
What if Kylo isn’t offering his hand? What if he has raised his hand to accept something instead? Not to take something, but to accept it.
I am a fan of the theory that Kylo is going to help Rey escape from Snoke towards the end of the movie. Now, what if at some point in that battle Kylo loses his lightsaber? Rey is pretty damn adaptive and if Snoke’s guard (I dare not try and spell it from memory. Praetorian?) carry staffs she could use one easily. So what if in this moment Rey is offering Anakin’s lightsaber to Kylo? This object that he has covetted. “That lightsaber. It belongs to me.” Because he wants to emulate Darth Vader, the lightsaber has rejected him before. But now as he turns back towards the light and stops fighting it, that is when he becomes worthy to live up to his grandfather’s legacy. Not as the grandson of Darth Vader, but as the grandson of Anakin Skywalker. And not as Kylo Ren, but as Ben Solo.
That is why his face looks so shocked, so touched, intense, and maybe even hopeful. His hand looks like it is shaking a little as he reaches out for this object of power that means so much to him as a relic of the Skywalker’s. He is a Solo, but he is also a Skywalker. That lightsaber isn’t meant for Kylo, it is meant for Ben. If anybody is a good example of 'It is never too late to change.' it is Anakin Skywalker."