Tough question, especially for something that is so subjective. People who dislike The Hobbit will say that "The Hobbit" is a bad theme, whereas someone who hates the band Kiss or Metallica will say those are terrible themes.
A more objective approach to answer this question would be to look at popularity statistics to see what particular theme recently used in a game is less known, less mentioned (say for example, in tweets, facebook posts, news articles, etc.), or less valuable.
Without doing the research, I'd be willing to say that solid themes like KISS that have a time honored and well respected name will hold up well. The Walking Dead is an enormously popular show currently, thus making it a valuable theme, but extended popularity will be questionable when the show ends.