Anakin is an ancestor to a Solo... how, again? Through Leia? Idk the literary canon, which was disavowed before the new movie's means nothing. And an ancestor through his daughter doesn't actually count. Not when she only has ancestors through her mother's side.
Nvm the fact that her family was probably a sham in order to hide her identity from Vader, her father. Anybody labeled as an uncle or other relative is either completely fake or is from Padme's lineage. Where does Leia say Anakin is related to a solo again? Certainly, not in the movie that picks and chooses from the lore what is canon and isn't.
As a light saber, it probably has a lot of interaction with the force. I find it more likely that Rey's ability and sensitivity to the force allowed her to see the images, rather than the the force recognizing her genome. Even the old alien she got it from knew there was something about it. She couldn't use the force, but she could feel it reacting to someone who could. Plain to say, the alien isn't related to Rey and if it was a family thing, she would have had nothing to do with those scenes. Your generational passing isn't a good theory. Obiwan gave Luke his father's lightsaber. he didn't have any visions as a result. I call it plothole bs. take it as you will, I don't think it is a hint to her lineage so much as absolute basic foreshadowing of events to come.
Where is obiwan's reincarnation? Where is yoda's?
It seems clear though that her parents definitely had something to do with the force or at leas the resistance. They knew their end was as near as the hunting empire soldiers. They left their daughter there to try to keep her safe and wait for their return if they ever escaped. They clearly died. Rey represses her memories, and in force viewings, which touch upon herself and her destiny, she is forced to face them again. Those hard memories make her flee to try to forget it all again. Her repression keeps her from truly realizing her ability with the force. Which is why the story, the saber, and her encounter with kylo ren forces it of her.
I think her past has connection with Luke, but I don't believe she is related in any way to him.
Luke has never had any romantic connections that I've heard of. Maybe she's a relative if they pull a flashback where he suddenly has had a relationship to again tempt him to the darkside and perhaps color his interaction with kylo and push him in turn towards the dark side in his place but.... that seems like a terrible, lazy direction to take things.
I'd rather she be like Neville, with her own family having made an impact on their own than she be the over obvious harry potter inheritor plotline.