In case you were confused about the tone of the DC movie universe, this new Justice League logo should make things perfectly clear: This isn’t your kid’s bright and shiny Marvel Cinematic Universe. Oh, no. This is a heavy metal comic book world where superheroes straight-up SHRED. Can you hear that? It’s the sound of a guitar wailing in the distance, heralding the arrival of heroes in need of a stiff drink and a bar fight.