Kylo Ren is Anakin Skywalker after Anakin turned to the Dark Side...

Figuratively of course but yeah, you already knew that but I think it goes deeper...

Rey is Luke before he finds out about his father. Snoke is Palpatine after Palpatine seduces Anakin to the Dark Side. At the same time, Rey is Leia before she knows Luke is her brother. And still yet, Kylo is Luke before he knows Leia is his sister. But wait, there's more! Palpatine is Plagueis after Palpatine is killed by Anakin.

Which brings us back to: Do, Re, Mi, Fa, So, La, Ti, Do! Get it? It rhymes. :)

What I think this means is that we are getting the two stories of Luke and Anakin in one. It's like the snake that eats it's own tail. These are stories intertwined by fate and are coming back full circle and show the Skywalkers are doomed to repeat their stories over and over for generations in an almost, if not fully, cruel way.

Oh, and Hux is Tarkin.