To quote the flamboyant coach of the old Houston Oilers, Jerry Glanville, NFL stands for “not for long”. It’s harder than ever to stay atop a relentlessly equalised league, but after the most comprehensive Super Bowl shellacking of recent times, “dynasty” was quickly being invoked for Seattle. There’s cause: the Seahawks’ core is unusually young by the standards of Super Bowl champs, led by third-year QB Russell Wilson. The big, physical secondary, keyed by Richard Sherman (pictured), Kam Chancellor and Earl Thomas, is the state of the art in NFL defence, the model that the rest of the league is trying to copy. The big challenge Seattle will face is the title coming too early, as it were, or the simple reality that it’s been a decade since a team made (let alone won) back-to-back Supers. Another obstacle is division rival San Francisco, a similarly built team that was only a tipped ball by Sherman away from beating them in the NFC championship game last season.