It’s been four years since Martin McDonagh directed his first feature-length picture, but the wait between In Bruges and McDonagh’s next project is almost over. Today, Seven Psychopaths gets its first trailer, which should blow away any preconceptions you may have formed about the film in your head based on the title. For me, this is nothing but good news; with one two and a half minute clip, McDonagh’s placed his sophomore effort firmly on my radar for the fall season. Put more simply, Seven Psychopaths looks hilarious and deranged, but what else can you expect from a filmmaker with such a black sense of humor and a cast containing everyone from Walken to Rockwell to…