This is either the biggest broadcasting coup of the year, or the most confusing career move in recent memory.Mike Tomlin, longtime Pittsburgh Steelers head coach, is joining NBC's Sunday Night NFL pregame show, according to multiple reports. But here's what nobody's making clear: Is he still coaching the Steelers?If Tomlin is stepping away from coaching to join NBC full-time, that's a seismic shift in the NFL landscape. We're talking about one of the most respected coaches in the game, a guy who's never had a losing season, walking away from the sidelines to analyze games on TV.If he's doing both - coaching and broadcasting - that's unprecedented in the modern NFL. How does that even work? Does he fly to the NBC studios between practices? Does he tape segments in advance? What happens during Steelers bye weeks versus game weeks?Either way, this is a massive get for NBC. Tomlin never gives boring answers. He's quotable, insightful, and has zero tolerance for nonsense. Putting him on live TV every Sunday night is going to be must-watch television, whether he's breaking down games or calling out players and coaches.But if Tomlin is done coaching, the Steelers are facing a franchise-altering moment. Who replaces a legend? How do you follow up someone who's been the standard of consistency in Pittsburgh for nearly two decades?We need clarity on this story, folks. Is Tomlin pulling double duty? Is he transitioning to media? Did something happen in Pittsburgh that we don't know about?Whatever the case, Sunday Night Football just got a lot more interesting.