Marvel Comics isn’t very good at secrets. Oh sure, it had that big one back in ’85, which went so well that it inspired the entire concept of company-wide crossover summer events. Every 'crisis', every 'age of', every act of vengeance, and every time Atlantis gets its Speedos in a twist and decides to bombard Manhattan, you can trace it right back to Secret Wars. Since then though, the magic seems to have waned somewhat.