Today at the Comic-Con panel “A Conversation with the Russo Brothers” (moderated by our own Steve Weintraub), the filmmaking duo revealed a new trailer for their upcoming thriller 21 Bridges, which they produced through their company AGBO. The film follows an NYPD detective (Chadwick Boseman) who leads a citywide manhunt for a pair of cop killers. However, as his search intensifies, he becomes caught in a tangled web of dark conspiracies and questionable allegiances. I’m fascinated by this movie because it looks like a very difficult needle to thread. On the one hand, you don’t want to …