If you live in Hollywood, you’re going to see dozens of billboards for fall TV shows over the next few months. Most will try to convey as much information as possible by showing actors, a title, a tagline and premiere date. I cannot imagine any will be as awesomely minimalist as this one, which just popped up Monday morning. You might not know what this is. You can barely see what this is! But when a show has as much buzz as Marvel’s "Agents of S.H.I.E.L.D.," it doesn’t need to explain itself.