While watching the films / shows to relate to the attractions does make the ride itself have more context and be a little more enjoyable depending on what ride. I think it's mainly the nostalgia, or little references to the film / show that make it so. I say this, because I wouldn't say that necessarily knowing the film, or have seen the film makes the ride all that much more amazing. A lot of rides (not all) have missions, or a storyline that has no relation to the film at all. As in, it could happen (in the film), but never happens in the actual film itself (the ride it might be based upon).
Also, there are plenty of rides I've been on without seeing the film and have enjoyed them. Some of them being a personal favorite of mine. However, some I've watched after the fact and have made it better. However, there are some I've seen after the fact that makes no difference.
The point I am trying to make is, if you can't cover it all, or your children can't see all the films, or shows, do not worry about it. It's the experience and memories which will truly make it a great time. Besides, if anything, in the future if you, or your children can see more of the films you might have not covered and if you come back, it will make the experience all the more better.
