Chris Hemsworth in "Thor: Ragnarok" (Credit: Marvel) Through reviews, box-office receipts and online chatter, comic-book fans have spoken — 2017 was a banner year for movies starring superpowered, or at least high-achieving, heroes. Not only did such movies more or less rule the box office over the last 12 months, according to Rotten Tomatoes four of the greatest superhero films of all time were released in 2017.