I just want to post a quick thing (first post) rey might be the daughter of leia and han and was hidden from kylo ren because he's LUKE SKYWALKER PEOPLE. they were trying to protect her so they sent her to a planet where she grew up to be a ravager.
Next i want to talk about Finn, he is the son of Luke and doesn't know because like Luke he was hidden from him turn to the dark side and that's why eventually he meets Rey (you know like the last 3 star wars movies).
Next is kylo ren the reason why i think he's Luke is because in the last trailer kylo says he will finish what he started (referring to Darth Vader) which means Luke is finishing what his father started.
Hope you liked my first post let me know thx and bye