Ok I went to see Star Wars for the second time and picked up on quite a few things. Spoilers ahead.
First thing is rey Luke Skywalkers daughter?
There are many things in the movie that point to her being the son of the legendary Jedi.
#1 In the flashback scene when she touches the lightsaber for the first time, there are a few subtle hints. First the arm holding her back is the arm of the merchant she traded with. Second the ship that leaves her closely resembles the ship leia arrives on, when she comes to save Han and Fin. Third when you hear the young girl crying it's almost as if she's says "Father". Theory is that she was sent away to protect her from kylo ren.
#2 When Kylo Ren interrogates Rey after capturing her. He mentions a island and a ocean, as well as mentioned a father she never got to grow up with. These are things that were not shown in the flashback and were brought to light long before anyone knew the location of Luke. Maybe she had been to that island in the past?
#3 When Rey finally arrives at the resistance base for the first time it triggers a few events. First leia embraces Rey as though she knows her. Second R2D2 appears to come out of his hibernation upon her coming within his vicinity. Maybe he could since her presence? Third when she leaves it is as if her and leia had a long talk, and leia wishes her a farewell with the infamous line "May the force be with you". Which leaves to question of all people why send Rey to meet with Luke? Did leia tell Rey who her relation to Luke was?
#4 Arriving on the island. Just a couple things here. Firstly, when she meets Luke it does seem as though he is standing next to a grave, but who's grave? Everyone of importance died long ago, could it be his lost love slain in battle. It's all speculation, but leaves you to wonder. Secondly when they see each other the emotion they show almost signifies that they know each other and it's almost as if they have been reunited.
Most of this is speculation, but just little hints I noticed.
The second thing in speculation is, is supreme Lord snoke, Darth Plagueis? There are just a few things that point to this.
#1 Little history, Darth Plagueis was such a master of the force that he learned to manipulate the force to create life and to bring back the dead. This was told in the prequels by Palpatine aka Darth Sidious. So it is very likely that he could bring himself back to life or keep himself from dying. Even though Palaptine believe that he slayed his master.
#2 He closely resembles what Darth Plagueis would look like, including the scars to his face.
#3 We know he is a Powerful Sith Lord, because he wants to finish Kylo Ren's training of the dark side. If anything Yoda taught us there must be two sith "no more, no less", but that brings to question was Plagueis alive when Vader and Sidious were present in Star Wars?
If you read this, Thank You for taking the time and please reply.