The "spoilers" above are easy guesses for sure, but Ren killing Han doesn't mirror New Hope. Ren would have to kill his "Master", which is certainly not going to be Han. Also, It really seems like Ren and Rey are going to be siblings, and their parents are most likely going to be Han & Leia, so I doubt Ren kills his own Dad.
Luke probably has no offspring and is most likely to be the "Master" and to eventually face off against Ren. Of the old cast, he's most likely to be killed first. Maybe Han dies too somewhere, but seems a bit overloaded if you kill off all the old timers in the first episode. I expect Luke or Han to make Ep 8, and I'm expecting just one of them to die in Ep 7. Gotta keep the emotional shit spaced out.
In the trailers we see Ren almost slicing Rey's head off. IMO he stops himself since she's his sister. Maybe he feels the force in her or some shit if he's not sure right away they're siblings. Or maybe he's proving a point to her and wants her to join him on the dark side.
Can't wait.