From my observation, the popularity of these things are not at all exclusive to the autism community.
However, they are not at all popular with me. Actually, for me, their popularity is a pretty steep negative.
I did used to like Star Trek when it was about discovery and adventure - before it became all about morbid fighting.
Star Wars, to my knowledge, has been only about morbid fighting from the very start.
I had to look up Zelda as I never heard of it. My problem with that is regardless of the theme, I can't handle games - any game. Can't relate or form any kind of mental relation to them. Games are profoundly confusing to me.
I also strongly dislike any movie or story that involves morbid fighting / killing.