I don't think that's completely true. The original Malifacent made a few years ago, did change the story arc to appeal to a more modern audience but that doesn't mean it's bad. I appreciated the new view and the values displayed in the movie. Zombieland has taken a serious genre and turned it into a comedy. This is something people have always craved. An old example of this is the Scary Movie franchise which poked fun at serious movies.