March Madness has taken a power turn as it turns to the Final Four. No more plucky underdogs, much as we enjoyed the run by Saint Peter’s. No more double-digit seeds looking for upsets. This year’s Final Four is Duke and Carolina, Kansas, and Villanova, four powerhouses looking to add another national championship to their formidable resumes. Blue bloods in the Big Easy. It could be an all-time weekend of games and we’ve got a rundown of what to look for: Teams Kansas. The lone No. 1 seed left in the bracket may be Bill Self’s best chance to add an elusive second national championship to the one he and the Jayhawks won in 2008. Duke. You may have heard: Coach K in his final NCAA Tournament. A walk-off national title would be the perfect ending to a Hall of Fame career that includes the most wins in NCAA history. …