By the very nature of this site it is FULL of story spoilers. Luke is Vader’s son, Soilent Green is PEOPLE, Bruce Willis is a ghost, and the Planet of the Apes is Earth. So, I suggest, if you really care about the stories for your own enjoyment, watch them first. That’s always a good thing to do when we’re talking about movies our kids will be watching. Of course, that isn’t going to be easy to do for movies that are new to theaters.
There’s not much that can be done about preventing spoilers here. So if you are weary of finding out how it ends, watch the movie before reading the exploration of a particular title. You might even find that watching the movie again after reading about it here will give you another perception of it.