I've never watched that old show. My kids certainly haven't. They don't get what the big deal is either. I'm not sure what is "scary" about it. I spend half the time explaining to them why it is supposed to be scary.
It is a ride we go on once and call it good. I would never go on it without a fast pass.
I'm not saying guardians of the galaxy would be an improvement. But it would be something my kids would recognize looooong before some tv show from 50 years ago.
That being said, it is very likely I'm not the normal one here. We go to disneyland every other year or so. Maybe you guys who go every week have a better grasp on things.