Six years and seven movies in, the DC Extended Universe—or whatever it is we're calling Warner Bros.' on-going comic book experiment these days—is a fascinating thing. By most metrics, it's been a success from the start. Man of Steel opened things up in 2013 with an impressive $668 million worldwide. Batman vs. Superman: Dawn of Justice took things to new heights with a whopping $873.6 million. Suicide Squad shockingly—and, let's be honest, hilariously—won an Oscar. An Oscar. But Suicide Squad is also a film that asked you to believe Jai Courtney …