Well, I don't have any kids and never will.
However, I have already shown my nieces and nephews:
The Walking Dead
Star Trek (Abrams)
LOTR & The Hobbit
Planet of the Apes (new)
If given a chance, I will also show them The Prisoner, Blake's 7, The Twilight Zone, SG1, Close Encounters of the Third Kind, and many more.